Kong products are wonderful!

Also, Nylabones are really good for chewers. I have two Labs who can destroy anything with a few bites, and they *loooove* Nylabones! Just make sure that when you buy it you are buying the ones labeled "Durable", because they also make products for light chewers. They also have a line of edible bones but they are gone in 2 seconds flat with my girls. The Original "flavored" (it's not a flavor, really) Durable Nylabones are what we get. We have them all over the house so they can pick those up to chew on instead of the furniture or something. And they are completely safe if ingested.