Our dog, Dakota, has one habit we need to break. But we have not had any progress. He takes notions to go get a piece of our clothing, shoes, bookmarks, kniting, etc. and chews on it. He has ruined shoes, shirts, and tangled yarn. We try and keep everything out of his reach by shutting doors, etc. He has even grabbed ahold of blanket and sheet and pulled them off the bed. We catch him and tell him to "Leave it" and he does. Take item away from him and Say "NO" Nothing has changed his behavior. Any suggestions.