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Happy cats. Happy dogs. Thanks to science.

Zazie Todd PhD is the award-winning author of Wag: The Science of Making Your Dog Happy and Purr: The Science of Making Your Cat Happy. Here at Companion Animal Psychology, she's been inspiring people to have happier pets since 2012.

Zazie Todd PhD with her dog Bodger and her two books Wag and Purr 

“A digestible mixture of science summaries, expert opinions, anecdotes about Zazie’s cats, and practical tips. Purr is definitely a book your cat would want you to read!"
Dr. Sarah Ellis, co-author of The Trainable Cat and Head of Cat Advocacy, International Cat Care

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Read an excerpt from Purr in The Times

Get PURR Chapters/Indigo  Indiebound  Bookshop  Barnes & Noble  Amazon  Blackwells  Waterstones  Booktopia

In Canada, signed copies of Purr are available from Black Bond Books via this link: https://blackbondbooks.com/purr

This page contains affiliate links which means I may earn a commission on qualifying purchases at no cost to you.

"Zazie Todd, a psychologist and dog trainer, gives us the latest research and insights that can help you better understand your dog. Practical, compassionate, thorough — and based on science rather than wishful thinking — Wag is also a gift you should give to yourself and the dog or dogs in your life. I loved it!” 
Cat Warren, NYT-Bestselling author of What the Dog Knows


In Canada, signed copies of Wag are available from Black Bond Books with this link: https://blackbondbooks.com/wag

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Upcoming Events


Webinar on demand (Free): Reading Cats and Dogs: A Conversation with Lili Chin, Sassafras Lowrey, and Zazie Todd (part of Companion Animal Psychology's tenth anniversary celebrations)


Recent Media


The science of making your cat happy, Breakfast Television, 9 May 2022



Contented cats, Pet Connection, 9 May 2022

The science of making your cat happy, CTV Your Morning, 5 May 2022




Global National:


Cats deserve to be happy - here's how to enrich their lives, Zazie Todd interviewed by Dr. Marc Bekoff, Psychology Today, 29 April 2022

Ask an expert: Cat happiness, Global News Morning BC, 1 May 2022



Praise for Companion Animal Psychology

"Coolest behavior blog on the planet"--Jean Donaldson, Academy for Dog Trainers.

"My favourite animal-related blog"--Patricia McConnell, PhD

"For your average pet lover, it can be hard to figure out the best way to make their animals’ lives better. Enter Companion Animal Psychology, a blog packed with research-based information on how pets think."--Erin Blakemore, Washington Post.




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This page contains affiliate links which means I may earn a commission on qualifying purchases at no cost to you. As an Amazon Associate I earn from qualifying purchases.