They also drink water excessively and urinate excessively. Furthermore, behaviorally they can be hyperactive, nervous and aggressive. Gastrointestinal signs include intermittent vomiting and diarrhea. The diagnosis is made by a simple blood test. Kidney and liver function tests should also be performed because they can be affected or injured secondarily due to the excessive thyroid hormone production.
Hyperthyroidism is treatable.
Both medical and surgical options exist. Prognosis, however is dependent on how early the disorder is diagnosed, how severely other organs are affected and how well the animal responds to therapy.