Getting a puppy not to chew is a lost cause. It helps to get them plenty of exercise, to give them toys and chews and to keep stuff you don't want chewed on out of their reach. I had a chocolate lab for my last dog. That dog was smart and very obedient. I didn't want her on the sofa. She wouldn't get on it while we were there, but I could not figure out a way to keep her off of it while I was gone other than to keep her out of the room. I'll be interested in reading what others have done.