Any recommendations for chews for puppies? Rufus is 3 months old and we were told at the pet shop he couldn't have any of the natural/edible chews yet because he's too young. He likes the fairly soft teething flavoured nylabone ones, but they barely last about 15 mins before I have to take them off him. He has the harder nylabone ones but isn't as interested, and he has other toys but really seems to like the nylabone for his teeth. He has a kong and some ropes that he like to chew as well. Thanks!