Speaking only about domesticated animals…I know there are subtle differences between cat breeds but for a non animal lover, various dog breeds are obviously different sizes and shapes. Even without any knowledge of dogs a rottweiler is clearly different than a teacup chihuahua. With cats, they are all roughly the same size so unless you really know cats they all look the same. Why did these animals develop this way?
Answer by Kyle
Dogs have come from centuries of selective breeding because they were needed far more than a cat, thus a cat has no need to have been bred in different sizes. Dogs were made larger if they were to hunt lions (rhodesian ridgeback) and smaller if they were to hunt rabbits (beagle)