On Thanksgiving, according to Garfield, people “celebrate food by eating as much of it as possible. It’s a tradition, I love tradition.” But that tradition is history following a checkup from veterinarian Liz Wilson, a sassy lady who’s also the new heartthrob of Garfield’s owner, Jon. The bad news for Garfield: he must go on a diet. The good news for Jon: Liz agrees to come to his house for Thanksgiving.