Cats are cute, but they’re also little wrecking crews in a home or yard thanks to their natural tendencies to scratch and mark territories. Dogs and cats are from different species of animals, appealing to different types of people. Both have provided services and companionship to humans for many centuries. As it turns out, a lot of your pet's. It's adorable when your cat rolls over to show you her belly, but do you know why she does it?