I'm personally not a fan of pig ears. They have no nutritional value and are consumed very quickly so they don't curb the need for chewing either. Doggie junk food. I compare them to potato chips for humans.

I'd get hollow sterilized bones, Dentabones, Greenies, or something along those lines. I wouldn't advise giving rawhide unless you strictly supervise the rawhide chewing at all times.