Complete turnaround
Our sixteen years old cat had become very very thin, was drinking a lot of water, constantly craving food, overheating and his coat was deteriorating. Hill's Thyroid Care Biscuit and wet tinned food had a positive effect that was noticeable after one week but confirmed after two weeks. He does not mind there is only one flavour (that I can find), and although he still drinks water it is more 'normal' - as his behaviour. It worked for our cat!