A few of my favorites are:
1. Fluke(dogs)
2. Homeward Bound(Dogs and a Cat)
3. Cats & Dogs(Dogs and Cats)
4. Brother Bear(bears, moose)
5. Secret of NIMH(rats,mice)
6. Ice Age(mammoth, sloth, saber-tooth cat)
7. Spirit(Horses)
8. All Dogs Go to Heaven(Dogs)
9. Lady and The Tramp II(dogs)
10. Fox and the Hound(dog, fox)