overactive thyroid in cats symptoms
Each cat develops different symptoms when the thyroid gland is malfunctioning. Most cats develop a rapid heart rate and lose weight even though they are eating more. In around 50% of hyperthyroid cases, increased water consumption and vomiting develop.
Veterinarians who have seen a cat with untreated feline hyperthyroidism often see cats that have grown very sick over the years. A cat with untreated hyperthyroidism may stop eating altogether. It may also exhibit blood in its stools. These are very serious symptoms, but internal changes are even more serious. Feline hyperthyroidism, untreated, can cause serious heart problems. This is because the catâs heart must work harder to match the state of its overactive metabolism.