#1- I like the cleanliness of this design the best, with the dog not having its leg over the horse's leg. The cat's tail looks a little weird but for some reason I still like it better than the cat without the tail. The horse and the cat look engaging, and the dog looks a little....standardized. Like, the dog is static, whereas the other two nimals show movement and therefore life. But the panting/walking dog somehow doesn't look any less static, so I'd still choose this one first. What else could the dog be doing? Maybe if it's head carriage were a little different and it didn't look to me like it has neck pain....
#2 - This might be a more "professional" choice colorwise, but I actually like the multiple colors of #1.