I Love To Be Kneaded

My dog loves to be "kneaded." He loves to be petted just about every other way too. LOL

Is "He loves to be petted." or "He loves to be pet." the proper way to write that? I've seen it written both ways and always wondered.

Gayle took this photo and added the caption, "I love to be kneaded." I just wanted to give proper credit.