I agree with Elle we have a 3 yo lab and he chewed a lot of things as a pup. If you teach them what they can chew on and what they cant they learn quickly. You will find if you put a lot of effort in training when they are pups you will have a fantastic dog. We put a lot of time into training our boy and he amazing now, couldn't ask for a better dog!
Lab lovers unite! Hehe they really are awesome dogs, I'd have 10 if I could