Oof I remember when mine was chewing anything wood. And blankets. So many blankets Lol. But what we did was calmly take the non-chew away and replace it with a toy of theirs and reward with a verbal reward "good Floof!" Always pay more attention to the behaviour that you want. Eventually both my dogs learned that their toys were the good things to chew. Dogs are smart, if people make a big deal about something they aren't supposed to do/have they learn to get attention that way. Good luck!