I think as long as you supervise your pet with their products they are fine. Just like you wouldn't leave a small child alone with a package of hard candies.

My dogs get pig ears and rawhides once in a blue moon and they love dried chicken filets so I try to buy them as much as possible.

Also, anything done in moderation is a good thing. I don't think feeding a dog pig ears everyday of it's life is going to be of any value to them (besides them thinking they're in heaven!)