Hi Caroline
I would see how he goes with them - when I gave Molo his first one, I limited it to an hour, but he still got a bit of a runny poo's the next day.
I waited until he was a bit older and he is fine with them now - I confess I leave one down for him during the day (although I give him the slightly less smelly Good Boy packaged ones
) and replace them every couple of days. He never chews bits off, just chews it like gum, dangling out of ther side of his mouth!
I assume that they are mainly dried skin, so probaby no worse than raw-hide I would imagine - anyway, once hes through the teething stage he will have them rationed again.
Molo loves the ears, as rawhide is too hard for him at the moment, the ears go soggy and are easier to chew!