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Showing posts with label positive reinforcement. Show all posts
Showing posts with label positive reinforcement. Show all posts

In Dog Training, Balance Is Off

It’s not a good thing when dog trainers describe themselves as ‘balanced’. Here’s why.


A Jack Russell Terrier balances on a rope bridge


When you think about balancing dogs, your first thoughts might be of a dog walking along a beam, all nicely balanced and not falling off. Or maybe of a dog posing for a photo with a pile of cookies balanced on their muzzle, to show off how good their balancing skills are.

But, unfortunately, this is not what people mean when they refer to ‘balanced’ dog training.

Balance is one of those weasel words in dog training. If we think of the word in the abstract, balance is a good thing; we don’t want to be off-balance and fall over. So it sounds persuasive. But in terms of dog training, balance has risks despite the name.

Of course, balance is just a word in the English language and may be used in various ways since it can be used by anyone.

When people refer to ‘balance’ in dog training they usually mean in terms of good and bad, i.e. not just using positive reinforcement but making use of punishment too.


What’s wrong with balanced methods for training dogs?


People who refer to ‘balance’ in dog training methods are often doing so to distinguish themselves from dog trainers who use positive reinforcement.

You may hear statements that people should “use all four quadrants” of dog training. In plain English, what they mean is that as well as rewarding good behaviour, you should also physically punish your dog. You’ll notice an appeal to authority – science – in using the technical terminology of quadrants. But it is just plain irresponsible to advise people to physically punish their dogs.

Balanced trainers often don’t use the word punishment to describe what they do. Instead they talk about ‘corrections’ or ‘correcting your dog’. But if we want to be technical about it, it’s positive punishment. (Still on a technical note, there may also be circumstances in which balanced trainers use negative reinforcement).


What does science tell us about combining rewards and corrections in dog training?


Because many ordinary people use a combination of rewards and punishment to train their dogs, scientists are able to assess how obedient (or otherwise) people rate their dogs and compare it to the methods used.

One study found that most people use rewards to train their dog at least some of the time: about half of all training involved the use of rewards (Arhant et al 2010). The most common rewards, used by 90% of dog owners, were petting and verbal praise. Food was used as a reward ‘often’ or ‘very often’ by more than half of dog owners, and play was another commonly used reward.

The problems with balanced dog training
The more often people used rewards in training, the more likely they were to say their dog was obedient, and the less likely they were to report aggression or anxiety.

This study also found that about a quarter of training was punishment-based (the remaining group of techniques they studied included things like comforting a dog).

The more often people used punishment, the more likely they were to say their dogs are aggressive and excitable. For little dogs, the risks are increased because the more often punishment was used, the more likely the dog was to be anxious and fearful too.

The most common types of punishment were scolding the dog and leash jerks, used by 80% of respondents. About 30% of owners slapped the dog, held the muzzle, used alpha rolls or shook the dog by the scruff as a form of punishment, while 15% used noise to startle the dog. These other types of punishment were used less often.

This study, as with most others on dog training methods, was correlational and we know that correlation does not prove causation. However, other studies also report similar findings. (If you specifically want an experiment where observers were blind to the training method used, there is one that found welfare implications with shock collars).

There is evidence that using physical punishment with dogs can lead to an aggressive response (Herron et al 2009). For example, 11% of owners who used prong collars (a common tool of balanced dog trainers) reported that it led to aggression. 15% of those who yelled “No!” at their dog also said that it sometimes led to aggression. Of those who said they “hit or kick [the] dog for undesirable behaviour”, 43% said there was an aggressive response.

Aggression is a serious problem because as well as potentially causing injury to a human, it may also result in the dog having to be euthanized.

On the other hand, most of these owners also used food rewards (89%), and 86% of them reported that it had a positive effect on behaviour.

So what we see is that people who use rewards to train their dogs report better-behaved dogs with fewer behaviour problems. Why 'balance' rewards and 'corrections' when corrections have risks? Using reward-based dog training is better than using both rewards and positive punishment.

In fact food is typically the best reward to use when training your dog. Dogs like food and it’s an efficient and effective way to train; what’s more, dogs like to work to earn rewards.


But how do you stop your dog from doing bad things?


This is a common question from people who are used to using punishment in training.

Switching to reward-based training involves a change in how you think about your dog’s behaviour. When people are in the habit of using punishment, they are reacting to the dog doing something they don’t want in order to try and stop it from happening.

Another way to look at it is to ask what you would like your dog to do instead, and train them to do that.

Suppose the problem is that your dog jumps up to greet everyone, and it’s annoying and embarrassing.

Well first of all, congratulations on having a friendly dog who likes to greet people. That’s brilliant!

And second, what would you like them to do instead? Perhaps you would like them to sit politely and be patted. Or perhaps you would prefer to teach them to target the person’s hand with their nose, so they can still sniff the person but don’t jump up. Either way, you can then develop a training plan and use rewards to teach your dog what to do.

The bit that surprises some people is that you can do this without having to physically punish the dog. You can avoid giving your dog the opportunity to jump in the first place. If your dog does jump up, you can ask the person to turn briefly away, or you can take the dog away from them and then try again (technically, negative punishment). Or if you prefer you can just ask them not to pet the dog (although many people will; after all it’s hard to resist petting a friendly dog). Then get back to your training plan.


But some people mean balanced as a state of mind…


I have also seen some people refer to dogs themselves, rather than training methods, as ‘balanced’ or even ‘well-balanced.’ Again, they don’t mean literally that they are able to stay upright; it’s a metaphor (sometimes used in conjunction with the wolf pack metaphor). And as I said above, it’s an appealing one because the opposite, imbalanced, has bad connotations. But what exactly does it mean? Since it is referring to an apparent state of mind, it’s hard to know exactly and impossible to assess.

It’s far better to think about our dogs’ behaviour in terms of things we can observe. For example, is the dog well-behaved or are they doing something you don't like? (And if so, what specifically, and what would you prefer them to do instead?). Are they happy? Or are they fearful? These are all things we can actually observe.


A Scottish Terrier balances on a beam


Although most people are able to recognize a happy dog, experience helps people spot fear. So it could be that some people who use aversive methods are not able to recognize signs of stress and fear in their dogs; I like to think that if they did, they would rethink their methods.

At the same time, some dog trainers claim their methods are ‘humane’ and ‘do not hurt’ when actually they are unpleasant for the dog, otherwise they would not work. Because dog training is not regulated, dog trainers are not required to be transparent about what they do (and some may not have the technical expertise to do so). Everyone who’s learned about quadrants of operant conditioning will know it can be hard – we can’t expect the average dog owner to know, but trainers should.


Deciding how to train your dog


When choosing a dog trainer, as well as looking for someone with a qualification and a commitment to ongoing professional development, pick someone who is proud to say they use food to train. If they are disparaging about the use of food as a reward, look elsewhere.

Because ‘balanced’ dog training involves combining the use of rewards with corrections that carry the risk of fear and aggression. That doesn’t sound like a good balance to me. It’s better to skip the risky part and stick to reward-based dog training.

So let’s take balance off the menu and use food rewards instead.

If you would like to know more about the research on dog training methods, check out my dog training research resources page which includes links to scientific papers as well as to blogs where you can read all about them.



Companion Animal Psychology is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

References
Arhant, C., Bubna-Littitz, H., Bartels, A., Futschik, A., & Troxler, J. (2010). Behaviour of smaller and larger dogs: Effects of training methods, inconsistency of owner behaviour and level of engagement in activities with the dog Applied Animal Behaviour Science, 123 (3-4), 131-142 DOI: 10.1016/j.applanim.2010.01.003
Herron, M., Shofer, F., & Reisner, I. (2009). Survey of the use and outcome of confrontational and non-confrontational training methods in client-owned dogs showing undesired behaviors Applied Animal Behaviour Science, 117 (1-2), 47-54 DOI: 10.1016/j.applanim.2008.12.011
Photos: alexei_tm (top), Mat Hayward (middle) and olga_i (all shutterstock.com)

Seven Reasons to Use Reward-Based Dog Training

It’s amazing what we can do when we use rewards to train our companion animals. Here are some reasons to give it a try.


A happy dog waiting for a reward



Positive reinforcement is recommended by professional organizations


Many professional organizations have spoken out against the use of punishment in dog training because the scientific evidence shows that it carries risks.

For example, Dogs Trust recommend the use of rewards in dog training. “In order to be effective and to gain the best results, all training should be based around positive rewards. Positive reward training works because if you reward your dog with something he wants as soon as he does what you ask, he is far more likely to do it again.”

In their advice on finding a dog trainer, the American Veterinary Society for Animal Behaviour says “AVSAB endorses training methods which allow animals to work for things (e.g., food, play, affection) that motivate them rather than techniques that focus on using fear or pain to punish them for undesirable behaviors. Look for a trainer who uses primarily or only reward-based training with treats, toys, and play. Avoid any trainer who advocates methods of physical force that can harm your pet such as hanging dogs by their collars or hitting them with their hands, feet, or leashes."

Some organizations (such as the Pet Professional Guild and the APDT (UK)) and some dog training schools (such as the Academy for Dog TrainersKaren Pryor Academy and the Victoria Stilwell Academy) have a code of practice that requires their members to use kind, humane methods instead of aversive techniques.

If you are looking for a dog trainer, whether for puppy class or behaviour problems, see my article on how to choose a dog trainer.

Reasons to use positive reinforcement in dog training


People report better results with positive reinforcement


Several studies have found that people who use positive reinforcement to train their dogs report a better-behaved dog than those who use aversive techniques.

In a study by Blackwell et al (2008), the dogs of people who used only positive reinforcement training were less likely to have behaviour problems. They suggested this could be because dogs don’t associate punishment with their behaviour, but instead with the owner or the context, and hence may become fearful and anxious.

Another study (Hiby et al 2004) found if dog owners used punishment (whether or not they also used rewards) their dogs were more likely to have problem behaviours. People who only used reward-based methods reported more obedient dogs

These results apply to dogs of all sizes. In a study that compared small and large dogs (Arhant et al 2010), those whose owners used more punishment were reported to have more problems of aggression and excitability whatever their size. However this was most pronounced for little dogs (less than 20kg).

Of particular concern is the finding that people who use confrontational methods (such as prong, choke and shock collars or growling at the dog) sometimes report an aggressive response (Herron, Shofer and Reisner 2009). This was never reported in response to using rewards.

These studies relied on owner reports, but another study used an experimental design to compare positive reinforcement to shock collars. They looked at teaching recall in the presence of livestock and found that, contrary to popular belief, the shock collars did not lead to better trained dogs (Cooper et al 2014). And in fact, the dogs trained with shock showed signs of stress, which brings us to the next point.

Reward-based training is better for animal welfare 

Happy Afghan hound trained with rewards

The conclusion of Cooper et al’s study is that the “immediate effects of training with an e-collar give rise to behavioural signs of distress in pet dogs, particularly when used at high settings.”

Another study looked at the body language of dogs at two training schools where the dogs had already learned sit and loose-leash walking. One school used positive reinforcement while the other school used tugging the leash or pushing the dog’s bottom down until it did the required behaviour. Dogs previously trained with the aversive techniques showed more stress-related behaviours, such as a lowered body posture, and looked less at their owner compared to those trained with positive reinforcement (Deldalle and Gaunet 2014).

If you use reward-based training, you avoid the risk that aversive techniques will cause stress, anxiety or fear. This is better for both the dog and you.

“Ultimately, reward-based training is less stressful or painful for the dog, and, hence, safer for the owner,” say Herron, Shofer and Reisner (2009).

Positive reinforcement dog training is good enrichment 


Successful problem-solving, like learning a behaviour in exchange for a reward, makes dogs happy.

Research has shown dogs that work to earn a reward are happier than those that are just given a reward (McGowan et al 2014). The scientists called the dog learning s/he could earn a reward the “Eureka effect”.

Dr. Ragen McGowan told me “Think back to last time you learned a complicated new task... do you remember the excitement you felt when you completed the task correctly? Our work suggests that dogs may also experience this 'Eureka Effect.' In other words, learning itself is rewarding for dogs.”

This study shows that giving your dog the opportunity to earn rewards is a good enrichment activity (another thing that's good for animal welfare).

Dogs get better at learning with rewards


Dogs that have previously been trained using positive reinforcement do better at learning a new task.

This was the finding of a study by Rooney and Cowan (2011) who took videos of owners and their dogs interacting at home. One of the tasks involved giving owners a ball and a bag of treats that they could use (or not) as they wished. The owners were asked to teach their dog to touch a spoon.

The dogs who learned the new task more quickly were the ones whose owners had used more rewards in earlier training.

The explanation? It’s probably down to a more motivated dog. Rooney and Cowan say “a past history of rewards-based training increases a dog-owner partnership’s success in future training; possibly by increasing the dog’s motivation and aptitude to learn, because it learns to anticipate rewards.”

It focusses on what your dog can do


Reward-based dog training is good for your dog
It makes sense to teach your dog what to do, rather than what not to do. It can get very frustrating if your dog keeps doing something you don’t like. It’s probably frustrating for your dog too.

For example, suppose your dog jumps up on you. They are probably trying to get close to you and wanting some fuss, which they don’t get if you push them away. However you can teach them that if they keep all four paws on the ground they will be rewarded with affection and a treat. Over time, they will learn to do this instead. It’s a win for you and the dog.

If you don’t actually teach them what to do, how can you expect them to learn it?

Reward-based dog training is fun 


Dog training should be fun for you and your dog. Using rewards to teach your dog what to do can be a fun game for you and your dog to enjoy together. As well as basic obedience behaviours like sit, down and stay, you can teach tricks such as shake hands, wave, say your prayers, sit pretty, or spin.

Don’t forget to reward yourself after a good training session – you’ve earned it, too!

What do you like best about using rewards to train your dog?

This post is part of the 2016 Train for Rewards Blog Party, hosted here at Companion Animal Psychology. Check out the other posts and find out how you can take part in #Train4Rewards. And read the 2017 Train for Rewards blog party here for lots more posts on reward-based dog training, cat training, etc.


You might also like: What is positive reinforcement in dog training? on this blog; and the double advantage of reward-based training (over at the Academy for Dog Trainers)


References
Arhant, C., Bubna-Littitz, H., Bartels, A., Futschik, A., & Troxler, J. (2010). Behaviour of smaller and larger dogs: Effects of training methods, inconsistency of owner behaviour and level of engagement in activities with the dog Applied Animal Behaviour Science, 123 (3-4), 131-142 DOI: 10.1016/j.applanim.2010.01.003
Blackwell, E., Twells, C., Seawright, A., & Casey, R. (2008). The relationship between training methods and the occurrence of behavior problems, as reported by owners, in a population of domestic dogs Journal of Veterinary Behavior: Clinical Applications and Research, 3 (5), 207-217 DOI: 10.1016/j.jveb.2007.10.008
Cooper, J., Cracknell, N., Hardiman, J., Wright, H., & Mills, D. (2014). The Welfare Consequences and Efficacy of Training Pet Dogs with Remote Electronic Training Collars in Comparison to Reward Based Training PLoS ONE, 9 (9) DOI: 10.1371/journal.pone.0102722
Gaunet, F. (2009). How do guide dogs and pet dogs (Canis familiaris) ask their owners for their toy and for playing? Animal Cognition, 13 (2), 311-323 DOI: 10.1007/s10071-009-0279-z
Herron, M., Shofer, F., & Reisner, I. (2009). Survey of the use and outcome of confrontational and non-confrontational training methods in client-owned dogs showing undesired behaviors Applied Animal Behaviour Science, 117 (1-2), 47-54 DOI: 10.1016/j.applanim.2008.12.011
Hiby, E.F., Rooney, N.J., & Bradshaw, J.W.S. (2004). Dog training methods: Their use, effectiveness and interaction with behaviour and welfare Animal Welfare, 13, 63-69
McGowan, R., Rehn, T., Norling, Y., & Keeling, L. (2013). Positive affect and learning: exploring the “Eureka Effect” in dogs Animal Cognition, 17 (3), 577-587 DOI: 10.1007/s10071-013-0688-x
Rooney, N., & Cowan, S. (2011). Training methods and owner–dog interactions: Links with dog behaviour and learning ability Applied Animal Behaviour Science, 132 (3-4), 169-177 DOI: 10.1016/j.applanim.2011.03.007

The Train for Rewards Blog Party

This is the place for the Train for Rewards Blog Party to celebrate rewards-based training of our companion animals. Bloggers can add a link to their contributing posts below (please read the rules and get the button first).

Take Part in Train for Rewards

On 16th June:
  • Read the blog posts listed below, comment on them, and share your favourite posts on social media with the hashtag #Train4Rewards
  • Share a photo of your dog (or other companion animal) who is trained using rewards on social media with the hashtag #Train4Rewards
  • Reward yourself for participating with a cup of coffee, slice of cake, a walk in the woods, or whatever makes you happy.





Celebrate positive reinforcement with the #train4rewards blog party


Celebrate positive reinforcement dog training





Rewards-based training of dogs and other pets

Invitation to the Train for Rewards Blog Party

Join the blog party to celebrate rewards-based training of our dogs and other companion animals. #Train4Rewards

Positive reinforcement training for dogs and cats
Planning for the Train for Rewards Blog Party


Are you a blogger? Do you support rewards-based training for dogs and other animals? Would you like to take part in the #Train4Rewards blog party?

You are invited to write a blog post about rewards-based training of dogs or other companion animals, post it on your own blog on the set date, then come and share a link to it here. Bloggers from anywhere in the world are invited to take part.

Read on to find out more.

On Wednesday, 15th June:

1. Publish a post on your blog in support of the #Train4Rewards blog party. It can be words, photos, video, a podcast, or a combination, and relate to any kind of companion animal.  I’ve put some suggestions below to get you started.

Double-check your post to make sure the tone is friendly and supportive to people who might not know anything about positive reinforcement training – we want to encourage them to get interested.

2. Include the #Train4Rewards button in your post, using the code displayed underneath it. (See below if you need more info on how to do this).





3. Add your blog to the list on companionanimalpsychology.com. The list will be open from 5am PST on 15th June until 8am PST on 16th June. Don’t miss the deadline!

On Thursday 16th June:

1. Check out the full list of participating blogs on companionanimalpsychology.com. Visit the other blogs, and leave comments to show support for your fellow bloggers.

2. Share your blog post on social media using the hashtag #Train4Rewards.

3. Share your favourite posts from other participating blogs on social media, also using the hashtag #Train4Rewards. You don’t have to share all the posts (unless you want to), so pick the ones you like best and share those. You can spread this out throughout the day.

4. Feel proud of your contribution to improving animal welfare. Reward yourself with a piece of cake, a bunch of flowers, a walk in the woods, or whatever makes you happy.

Ideas for posts

The benefits of positive reinforcement dog training
Blog posts can be about any aspect of rewards-based training, so feel free to use your imagination. Here are some suggestions to get you started:

What you enjoy about training using positive reinforcement

How to use positive reinforcement to teach a behaviour or solve a behaviour problem

How to train your cat to go into a carrier

A video of your dog, cat, rabbit, rat or ferret doing tricks

The key thing that made you become a crossover trainer

Photos of dogs (or other animals) enjoying a training session

The best treats to use as rewards

Recipes for training treats

An ode to your bait pouch, written by your dog

Why you love your dog trainer

What is allowed: blog posts that celebrate the rewards-based training of companion animals.
What is not allowed: training that uses pain, including but not limited to choke and prong collars, electronic shock collars, alpha rolls, or other aversive techniques; blog posts of a commercial nature.

I reserve the right to not include posts if they are not within the spirit of the blog party. Please keep posts family-friendly.

If you want, you can let me know that you are planning to take part. I look forward to reading your posts!

Technical Details

How to add the blog party button to your blog post: Copy the code that is displayed underneath the button. Put the code in the html part of your page.

In blogger, click the html button on the top left; in wordpress, the html button is on the top right. Position the code where you would like the button to appear e.g. if you want it at the bottom of the page, put it underneath all the other html code; if you want it at the top, put it at the top.

If you want to centre it, put <center> at the beginning of the code, and </center> after it.

When you go back to your compose field, you will see the button in your post.

In Squarespace, add a content block, scroll down to "More" and then click "Code".  Copy and paste the button code into the text editor that pops up.  The content block can then be moved around like any other content block.

If you choose to also include a text link to the blog party (this is not required), please make it a nofollow link.

How to add your blog post to the Train for Rewards list:
You need to use the specific permalink to your blog post, not the main url of your blog. If you have pictures in your post, you will have a choice of thumbnails. The linkup for the Train for Rewards Blog Party opens at 5am PST 15th June until 8am PST on 16th June 2016.

If you make a mistake or want to choose a different thumbnail, you can delete it and start again any time up to the deadline.

You will need to provide your email address in order to add your link, but this will only be used (if necessary) to communicate with you about this link-up. You will not be added to any email lists. If you would like to receive blog posts by email, you should subscribe to Companion Animal Psychology.


Make Your Dog Happy: Puppy Class!

Going to puppy class could be the best investment you make in your dog. 

A St. Bernard puppy in the snow... why puppies should go to puppy class


Puppy classes provide important socialization opportunities and early learning experiences for puppies up to 5 months old. Puppy class is not just about training, it’s also (even mostly) about socialization.

Socialization matters because dogs go through a developmental stage when happy, positive experiences with new people, dogs and things are important, and help to set them up to be happy, calm adult dogs. We know this because studies that kept puppies in isolation (e.g. Freedman, King and Elliot 1961) found they became very fearful.

Many dog trainers have socialization checklists, like this one from the late Dr. Sophia Yin that includes unfamiliar people and dogs, body handling, surfaces and sounds to which puppies should be socialized. We don’t know exactly when the sensitive period for socialization ends, and it may be different for different breeds (Morrow et al 2015), so we want to try and do as much socialization as possible before about 12 weeks.  


Chow Chow  puppy... why going to puppy class is a good idea

At puppy class, your pup gets to meet new people (including the other people at the class, the trainer and the assistant(s)). That’s a few people checked off your socialization list already! 

In addition, they meet the other puppies and get to play with them. As well as meeting unknown dogs, the play opportunities allow them to practise their doggy social skills and learn bite inhibition.

The important thing about socialization is that experiences should be positive ones. Sometimes people force their puppy into greetings even if they are shy and don’t want to meet; or complete strangers want to pet the cute puppy, and may not notice if the pup is scared. 

If there’s one rule about puppies, it’s that you should never terrify them. 

If your puppy is shy, that’s fine. Don’t force them into interactions they’re not comfortable with. 

A good puppy class will ensure that all the puppies are having a good time, by keeping shy puppies away from more boisterous ones, and letting puppies hide by their owners if they want to. As the weeks go by, your puppy will get more confident. 

"Puppy class is the single most important thing you'll do in your puppy's lifetime and is loads of fun for all,” says Jody Karow, founder of DogSense Online. “You'll want lots of off leash play opportunity during class with other young compatible puppies. We want everything about puppy class to be fun! Socialization is the top priority for your puppy’s first class. 

“Look for a class that focuses on puppies learning many new experiences are safe and fun. There will be plenty of time to teach proper manners and obedience behaviors. Puppy class is your opportunity to have a controlled environment for many first and early experiences. This allows us to ensure your puppy enjoys many things life in our modern world offers. 

“Think Kindergarten, it's all about the fun!"

In some places there’s a trend for puppy party, a one-off session at which your puppy plays with other puppies and meets the other people in the class. This sounds like a good alternative, but one study (Kutsumi et al 2013) found it does not offer the same benefits. Dogs who had attended a six-week puppy class not only performed better in response to commands, but were also friendlier to strangers compared to those who did not attend or who only attended a puppy party.




Because dog training is not licensed, choose your puppy class carefully. Remember the rule about not frightening puppies, and avoid anyone who uses aversives like leash corrections, choke or prong collars. See my article on how to choose a good dog trainer.

A good puppy class does not guarantee that your dog will never be fearful (e.g. genetics and early experiences before you bring them home also play a role) but it will go a long way to helping you meet your puppy’s socialization needs. 

What do you most enjoy about puppy class?

References
Freedman, D., King, J., & Elliot, O. (1961). Critical Period in the Social Development of Dogs Science, 133 (3457), 1016-1017 DOI: 10.1126/science.133.3457.1016 
KUTSUMI, A., NAGASAWA, M., OHTA, M., & OHTANI, N. (2013). Importance of Puppy Training for Future Behavior of the Dog Journal of Veterinary Medical Science, 75 (2), 141-149 DOI: 10.1292/jvms.12-0008 
Morrow, M., Ottobre, J., Ottobre, A., Neville, P., St-Pierre, N., Dreschel, N., & Pate, J. (2015). Breed-dependent differences in the onset of fear-related avoidance behavior in puppies Journal of Veterinary Behavior: Clinical Applications and Research, 10 (4), 286-294 DOI: 10.1016/j.jveb.2015.03.002
Photo: Rita Kochmarjova (top) and Eric Isselee (Shutterstock.com)
 
You might also like:
The right to walk away
De-stressing with a puppy for parents of children with autism
On puppies, pet stores and behaviour problems

Companion Animal Psychology is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.