Dogs have muzzles designed for strength. That reduces facial flexibility and limits emotional expressions. ... The smiling expression in a dog's face is reinforced by body posture.

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

Q: I’m seeing more and more suggestions that dogs should learn to wear muzzles. My dog is friendly, so what’s the benefit? A: We are among those who believe that every dog should be familiar ...

Dogs wearing a muzzle often get judged, as people automatically assume the worst. But one woman has recently shed light on five reasons why they are worn—and aggression isn't one of them.