A four-legged friend brings smiles to a rehabilitation center.

ELKINS PARK, Pa. (WPVI) -- A four-legged friend brought plenty of smiles to a rehabilitation center in Montgomery County.

Action news was there as Pender greeted workers at the Elkins Park campus of Moss Rehab.

All staff members also had a chance to stop by and play with him during lunchtime "Yappy Hour."

Time with therapy dogs is proven to lower stress and improve mental health.