Alternative to rawhide bones?

I have a large (fat!) yellow lab who can chew through a pigs ear in 5 minutes. She loves the big rawhide bones we give her and she can chew through those in an hour or less. I've read that they're bad so I think we shouldn't give them to her. She doesn't like toys...only her ball. Plastic squeaky toys don't amuse her. She chews these bones and leaves little shards all over the house. She also coughs and almost throws up...what's a safe alternative that I can easily buy from a pet store?