Watch the cutest, happiest dog in the world, Maymo, as he wags his tail over 500 times (517 to be exact) in a compilation of 80 different clips and try not to smile.

Dogs smile by pulling one or both lips back and may show all or some teeth. The "smiling" is often accompanied by other greeting behavior s, like approaching, wagging or even whining.

The cutest of all? When we offer up a big, goofy grin, she matches us with a smile of her own. ... Dogs smile by pulling one or both lips back and may show all or some teeth.

A dog with a sunny disposition and a zest for life is in need of a loving, forever home at one Texas animal shelter. While Colby Jack, an enthusiastic 6-year-old Dachshund mix, has the “cutest ...

A dog with a sunny disposition and a zest for life is in need of a loving, forever home at one Texas animal shelter. While Colby Jack, an enthusiastic 6-year-old Dachshund mix, has the “cutest ...

A dog with a sunny disposition and a zest for life is in need of a loving, forever home at one Texas animal shelter. While Colby Jack, an enthusiastic 6-year-old Dachshund mix, has the “cutest ...

Pup Park Shuttle was founded by a former UNC basketball player. Get ready to smile -- 20 dogs aboard a miniature school bus is likely the cutest thing you'll ever see.

Dogs smile by pulling one or both lips back and may show all or some teeth. The "smiling" is often accompanied by other greeting behavior s, like approaching, wagging or even whining.

A dog with a sunny disposition and a zest for life is in need of a loving, forever home at one Texas animal shelter. While Colby Jack, an enthusiastic 6-year-old Dachshund mix, has the “cutest ...

A dog with a sunny disposition and a zest for life is in need of a loving, forever home at one Texas animal shelter. While Colby Jack, an enthusiastic 6-year-old Dachshund mix, has the “cutest ...