Hyperthyroidism in pets, particularly cats, is a condition where the thyroid gland produces an excess of thyroid hormone. This hormonal imbalance can lead to a variety of symptoms including weight loss, increased appetite, hyperactivity, vomiting, diarrhea, and even heart problems. Recognizing the signs early is crucial for effective management. Treatment options vary but may include medication, dietary management, or in some cases, surgery or radioactive iodine therapy. With proper care and attention, pets with this condition can lead happy and comfortable lives.