Umbilical Hernias In Dogs: Everything You Need to Know | BeChewy
Mission Animal Hospital - Do cats and dogs have belly buttons? Not exactly the way humans do, but while they're developing, they also get nutrients through an umbilical cord. When they're born,
Do whales have a navel? - Baleines en direct
Do other mammals have umbilical cords? If yes, what do those animals do about them? Do they cut them off like humans do? - Quora