This is a common problem in older cats where the thyroid becomes overactive due to a tumour in the thyroid gland (s). It leads to an increase in appetite, weight loss, a fast heart rate, sometimes panting and often the coat appearing greasier and more unkempt. It is treatable in several ways including radioactive iodine, surgical removal of the thyroid gland(s), prescription medication for life or a diet without any iodine in it. If you notice any of these symptoms, please make a vet appointment so that blood tests can be run to check for the disease. We can provide prescription medications or the diet food.