dog have belly buttons

have you ever wondered if dogs have belly buttons? if you own a dog or study dogs you know they do. but if you dont have a dog you probably didnt know that. yes, dogs do have belly buttons but you cant see them. every mammal is born alive ( exept for the platipus) so they have umbrelicle cords and they atach to the belly button. after a while the belly button is begining to be covered by skin