My old whippet x getting on now and started to lose bit of weight but he's still enjoying his walks and eating well and seems happy but if things change I'd never let him suffer even though it'd break my heart to say good by , he's been my shadow for such a long time and probably best dog I've had.
Breast of lamb ,beef heart ,beef mince ,tripe and sardines and lamb qnd offal mince his what I feed him mostly and he does well on it ,