I watched two great documentaries on Netflix about dogs called: Dogs Decoded: Nova, and Science of Dogs. I highly recommend people see them, especially dog lovers. Both are terrific documentaries.
My partner Jeffrey is the cook in the family and I am the baker. Today, as Jeffery cooked some food for our Chihuahuas, I decided to try out the doggie treat cookbooks I bought months ago to bake them some treats. So, from the book: The (small dogs) Doggy Bone Cookbook by Michele Bledsoe, I made "Chasing Cheese" (They also make a cookbook for large dogs; I guess you just use more ingredients). And from the book: "MacPherson's K-9 Cookbook: Easy to make Dog Biscuit Recipes" by Mary MacPherson, I made "Sniff N' Bite Biscuits". Both cookbooks come with their own plastic dog bone "cookie" cutters: 1 cutter from the small dog cookbook, but 3 sizes of cutters from the other cookbook.
The results: Both dogs love the treats!!
They (and their relatives) also made kitty cookbook versions: The Kitty Treats Cookbook by Michele Bledsoe, and Easy-to-make Cat Treat Recipes by Dianne and Sarah MacPherson, which I plan to get and make some treats for my Siamese cat.