Stanley on Weight Watchers

So this is Stanley, my parents' chihuahua. Until about 2 weeks ago, he was so fat you couldn't see his legs because they were swallowed up by his body and you couldn't find his dog tags in his neck folds. A couple of weeks ago, my parents went away and left him at the pet "bed and breakfast" and he was so distraught, he wouldn't eat anything except canned Winn Dixie carrots. So, by the time they got back he had dropped all his weight and was skinny. Is it wrong that the first thing I thought was, well if Stanley could do it, so could I?