The Secretary for the Department of Homeland Security, Kirstjen "Krispy Kidders" Nielsen, does not seem to agree with the definition of a cage. She thinks there is a difference between a chain-link pen and a cage. But if she spent some time inside either one, she would realize that what is meant for housing animals should not be used for innocent children. Maybe she considers some children to be of less worth, like those "brown barbarians invading the southern border".
What is barbaric is to enforce a Family Separation Policy.