Has noone ever heard of "call of the wild" and "white fang"?
They're two books set in the gold-rush period of frontier america, with canines as the main characters. The first a sled dog, and the second, a wolf. The books are extremely old and a little hard to read, because of the old fashioned language. And, also pretty dark, but I think they're still good books.
I like how the books have a pretty accurate view on both humans and animals. Humans aren't portrayed as the smart and superior race, but rather just the [REDACTED] they actually are, completely hell-bent on becoming rich, and tearing themselves apart in the process, or dieing, because they think they're stronger than mother nature. And wolves aren't portrayed as the "wise and mystical creatures" but rather, as animals that need to survive in a pretty harsh world, and thus, do some pretty harsh stuff to achieve doing so.
It's not a very "happy book", no. But it gives you a pretty beautifull perspective on the life story of a little wolf, growing up and turning into a big wolf, and I think that that's awesome!