My top 3, well I kinda have a top 5 :

1) Homeward Bound(both of them!): This might be my favorite movie of all time. I watched these movies SO much as a little kid, I still watch them on occasions. They are so cute. I was so obsessed that I used to print and tape pictures of the animals all over my room. I named Sassy after the cat lol. I love that movie.
2) Lion King (1 and 2)
3) Lady and the tramp (1 and 2)
4) The Fox and the Hound. I LOVE that movie it's so sweet.
5) Milo and Otis.( I don't like how the one guy is the same voice for all of the animals but I still like the concept of the movie.)