Join the club,
I have a two and a half years labrador that still chews every possible thing in the house, so the bad news is that if he chews at 11 month he will probably go on for a long time.
But the good news is that you can prevent him from chewing your stuff by simply buying him special bones from a pet store. There are 2 kinds the phony ones and original bones from cattle (cow or perhaps pig or what ever). Buy him one of the original ones (if your pet store doesn't have them go to a butcher shop and ask to buy cow bones ,they will gladly sell it), the faked bones are also good but they fit smaller dogs mostly, because they dont last as long as the original ones. Anyway try them both, and I promiss you your problems will be over. It works like magic, your dog will chew only the bones.
The disadvantages are that 1 bone last for only a week to 2 weeks (atleast with my dog)
so you'll have to keep a stock of them, the other problem is that whenever I let my Lab take the bone to the yard, he simply dig a hole and hide it somewhere and then forget about it and go back to chewing our shoes.

Try this method (it really works!!!), in the worst case you loose a few bucks. Good luck :