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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

"Full of great science delivered with genuine warmth and heart; I just couldn't put this book down. Through Wag and now Purr, Zazie Todd has united dog-people and cat-people in a single goal: to make the lives of animals in our care richer and healthier—mentally, physically, emotionally—than we ever thought possible."—Jules Howard, zoological commentator and author of Wonderdog

“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

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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Cats and the pandemic (Zazie Todd at Modern Cat magazine)




Recent Media


Happy cats with Zazie Todd, Pod to the Rescue, 2 July 2022

National Adopt a Cat month review of Purr, Sweatpants and Coffee, 26 June 2022

PURR-cast with Anna Webb, A Dog's Life, 12 June 2022

The cat's nose knows, Cat Chat podcast, 2 June 2022


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



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



Global National:



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.