My 11 year old cat is starting to look skinny and skrawny and has that excess skin hanging underneath. Yet her weight is the same as it has been for years and her personality, bathroom, and eating habits are the same as well. Just 6 months ago her check-up and blood work came back fine too. Is this just part of the aging process? I know we all start to sag as we get older.
Many things can change in 6 mo. I recommend another visit to the vet for an exam and possible blood test. Good luck, vetcare