When does she chew the bedding?
Are you there to witness the act?
Reason I ask that is I am betting you are not there and she is chewing out of boredom. You need to catch her in the act and scold her with a simple firm NO!
But you need to catch the dog in the act becuase after the fact it will make no sense to the dog when she is scolded.
JW
I've never seen her chew anything. She always does it when we're not home or just not in the garage/backyard. I don't know how we'd catch her, since she's pretty quick.