One thing I've noticed about the dogs when they play with their Kongs is they use they paws like hands. It's so cute to watch. Buddy usually just uses his teeth to hold the Kong in place because he has such huge jaws--he's my 95 pound chocolate lab. He's always a gentleman, though, as you can see in the picture below.
The other three dogs, though, use their paws to hold their chew toy in place, as you can see in the picture of Chewy below. They love their toys and Chewy the chihuahua's toy is actually a dental chew. Sometimes I take it away from him then give it back to help train him not to be so aggressive.