The only difference in functional and non-functional is if they can complete there task, that dog was not hindered slowed or at all bothered by the fact he bit his lip that skin and wrinkles is part of the Fila and allows them to smell much to the same way the bloodhound does and everything from those ears (that's why high "neo" ears is a fault) and those wrinkles help in there original task of hunting large game and slaves in the jungle so it helps significantly in there function