White and Black Horse

There is a white horse and a black horse everyday they run around a tree infront of the barn. and everyday the white horse falls and the black horse picks it up. the next day they run around the tree the white horse falls the black horse picks it up. and the next day the white horse falls the black horse picks it up and the next day. they walk into the barn and the dog says to the black horse "How come you always pick him up when you know he is gonna fall tomorrow." the black horse turns to the white horse and says "Wow, a talking dog.