My cat is a neutered 5 year old male. Always was 'solid' - never obese. Ate wet food at night, dry in the am. A friend and neighbor was kind enough to 'pet sit' him for 3 weeks. When I returned home he was literally almost twice his previous size, and he'd developed brown spots in his eyes. Since I've been back (4 weeks) he has started waking me up to feed him at 3 am... Any advice on super-healthy cat food / what the spots might mean would be greatly appreciated.