I have several, but overweight dogs is a humongous one. I'm not talking about owners who see the problem and are trying to fix it. I'm talking about those whose dogs are grossly overweight and the owners brush it off with "she's just big boned", "it's all muscle" or "but we love him, we're not going to obsess over his weight". Then come the faux fixers, they've tried everything but nothing works, everything but actually sticking to something instead of making excuses about why they can't.