Hi, posted before (and thx for all replies) but have a new question- vets seem reluctant to try methimazole because of potential side FX and because T4 is in normal range, however cat is still ravenous, if wt and coat are good. Is there anything wrong with feeding 'on demand' (I'm here most of the time anyhow), e.g. he's 'hungry' almost hourly, so I've been giving him spoonfuls of food (no dry stuff/nothing with iodine). Can't afford radiation, his eyes apparently looked OK to vet and apart from huge litter box amts, he seems OK for 15.