And while age plays a major factor, some dogs may start showing signs of graying at just 2 years old. Stress and anxiety can also contribute to premature aging, Batteiger said. The conversation was ...

"A dog with a gray muzzle can still have plenty of happy, healthy years ahead," she said. "However, if graying is accompanied by other changes like weight loss, lethargy or coat texture ...

Lily Tomlin and Carl Reiner are also featured in the PSA for The Grey Muzzle Organization Kelli Bender is the Pets Editor at PEOPLE. She has been working at PEOPLE since 2013. Her work has ...

Grizzled gray upperparts, a blackish band on each side of the muzzle, and a black-tipped tail are some of the characters by which the gray fox differs from the red fox. Other differences include ...