I think it's not a big deal if they chew their beds a bit. Such habit is actual for mostly little pups. I've had the same with my labradors. However, they were chewing not only their beds or toys but the master bed as well! I know we should have forbidden them to enter the master bedroom, but I just couldn't. They are so cute when babies. Besides, our little daughter loves to play with them pretty everywhere. But our future doggies will definitely be forbidden to visit our room.