Hyperthyroidism in Senior Cats

Feline hyperthyroidism is a common disease in middle-aged to older cats. It is caused by an enlarged and overactive thyroid gland(s) – usually, a benign tumour that causes the production of excessive thyroid hormone (T4). Excessive levels of thyroid hormone circulating in your cat’s body can have a number of harmful effects, in particular on their heart, meaning it is crucial to start treatment as soon as possible. Signs of an overactive thyroid can include:

• Weight loss/muscle wasting,
• Increased appetite
• Hyperexcitability
• Increased vocalization day or night
• Increased thirst and urination
• Vomiting and/or diarrhoea

Your vet will confirm this condition through a blood test that can be run in the clinic and treatment can start right away!