ALIQUIPPA, Pa. (AP) — A Pennsylvania couple is offering a $500 reward for the safe return of their missing potbellied pig, who also serves as a therapy animal.

The Vietnamese potbellied pig named Charlotte was last seen July 11.

Charlotte served as a therapy animal at Beaver Elder Care and Rehab Center in Hopewell Township. She helped cheer up residents there.

Katie Manni and her fiance, Edward Perry, got Charlotte in February when she was 6 weeks old.

The pig was left in a car with a pair of pugs for about 10 minutes in July while Perry ran into the center to get keys from Manni, who directs nurses there.

Manni says someone might have opened the car door to help Charlotte get out or to see her up close, and she escaped.