I have a 12 yr old glen of imaal. Her stomach is not bloat, but is bloated looking. She has beeb tested for cushing came back negative. Vet then thought fat, placed her on metabolic diet. Now 2 months later she's lost 4 lbs, 2 more to go and hasn't lost anything on stomach. Still the same. Her stomach is hard and when I touch she tightens. Also severe fur loss with skin turn dark almost black. Vet put on thyroid meds but that hasn't helped either. Can anyone help?