Bone appétit.

A Pennsylvania humane society has gone viral after an anonymous adopter bought a scrumptious lunch for the shelter dogs, who more than showed their appreciation.

Pictures of the pups pounding down McDonald’s cheeseburgers attracted all sorts of attention on the Humane Society of Lebanon County’s Facebook page, with many users left in stitches by the messy eaters last week.

“This shark … swallow that burger whole … a little shakin’ … a little tenderizin’ … down it goes,” Brad Hampton commented on a pic of a pup swallowing a cheeseburger whole.

“Those are not just cheeseburgers, Those are DOUBLE cheeseburgers!” Facebook user Vikki De acutely pointed out.

Some, like Debbie Evans, were delighted to see the good boys and girls being given a much-deserved treat.

“LOVE to see things like this! So clean and neat, and animals being treated with love! Way to go Lebanon County Humane Society!” she commented. “Way to be an example of great animal welfare advocates!!!”

Others were simply mesmerized by the ravenous rovers, like Facebook user DaVina Ray.

“He was taking those tiny fast bites ‘nom, nom, nom, nom, nom!’ ” she wrote on a pic of a chewing Chihuahua.

“This dog just saw God,” Damian Pepin commented on a photo of a gray dog happily chomping down on the Mickey D’s.

But as fun and silly as the incredibly happy meal may seem, it marked a sentimental moment for the Humane Society, too.

“Donated by a previous adopter, burgers for the dogs were given, in memory of Joe Kunder,” the organization wrote, remembering a local man who died in a motorcycle crash in June.

For Kunder’s service, it was asked that those close to him donated to the society in lieu of sending flowers.

“Today was his heavenly 55th birthday, and this is something he would’ve loved.”