We have all wondered how smart our pups are at one time or another. (herepup.com)
She is a super smart pup and his happy to perform her routine of tricks for a few yummy treats. (dailypuppy.com)
I've never seen or heard of a dog playing peek - a-boo, so I'm thinking that Benny must be a pretty smart pup to understand the rules (such as they are). (tigertailfoods.com)