Thank you everyone for your responses. To clarify one thing - my dog generally only chews things when I'm out of the house. When I'm there, if I catch him chewing something (very rare), he stops as soon as I tell him to.

Regarding crate training, I have a couple of questions:

1. I have had my puppy for about a month now, and I have let him walk around most of the apartment. Won't he be confused and/or upset about being suddenly confined to a crate?

2. How big are these crates? My puppy is a black lab and growing pretty quickly.