I have recently read Snailing Through by Kadri Görkem Aka. The main character of the book is as you can guess, a snail. It was an interesting story. There is a hostility between snails and slugs in the book emerging from their cultural differences which they have to overcome through understanding each other and I think the way the subject is worked through these animals was a different approach.
Also, a bit from past, there is adventures of Lassie the dog. Those remain very popular still.