The various chapters hit on high interest topics that should appeal to young readers. Starting with a chapter on dog names is perfect, since that is one of the first ways we interact with pets, even before we get them. I loved the overview of the history of dog names, and the array of names that Horowitz has seen in her work. It's also interesting when Horowitz mentions her own pets and their names. There are some chapters that address the ethics of pet owning in a way that will be accessible to younger readers; is a pet property or part of the family? What are humans' obligations to dogs? Most importantly, what is the correct way to breed dogs, adopt dogs, and deal with medical issues relating to them, such as spaying and neutering as well as breed specific surgeries?
I've read a number of books on the history of human/dog interactions, but I can't remember the titles because they were adult books and I didn't buy them for my library. It's a topic that I find fascinating, but haven't seen well represented in middle grade literature. There are some good historical overviews, like Sarah Albee's Dog Days, but this is the best book I've seen on every day interactions with dogs as pets. Or, as Horowitz points out, members of our families that just happen to have four legs.