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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.

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

“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
"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 Purr are available from Black Bond Books via this link: https://blackbondbooks.com/purr and Wag with this link: https://blackbondbooks.com/wag

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Select Media

More cat chat, Radio New Zealand Sunday Morning, 4 June 2023


The Meow Hour, BBC Radio London, 9 April 2023 (interview starts about 40mins 30s)



How we know your dog loves you, Radio New Zealand Sunday Morning, 13 Nov 2022

North by Northwest with Sheryl MacKay, CBC Radio, 5 Nov 2022 (interview starts around the 53 min mark). 

How to Make Your Cat Happy, Radio New Zealand Sunday Morning, 18 September 2022

Purring is a love language no human can speak, The Atlantic, 7 September 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



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Here at Companion Animal Psychology, I love to help people have happier cats and dogs (according to science). It's open to everyone--and supported by readers like you.

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Praise for Companion Animal Psychology

"Companion Animal Psychology is, bar none, the single best resource for accessible information on dog and cat behavior."--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.

Support Companion Animal Psychology with a donation via debit, credit, or Paypal