Symptoms of hyperthyroidism in dogs:

1. The main symptoms of hyperthyroidism in dogs are abnormal excitement, enlarged thyroid gland, increased water intake, easy fatigue, fear of heat, Symptoms such as eye congestion and tearing.

2. Palpate under the neck along both sides of the trachea from the pharynx to the chest, and you can feel the enlarged thyroid tumor.

3. Sudden weight gain and excessive obesity, but no increase in appetite.

4. Patients with hyperthyroidism are prone to heart symptoms. The most common cardiac symptoms are symptoms of heart failure and symptoms of arrhythmia.

Causes of hyperthyroidism in dogs:

1. Hyperthyroidism in dogs is caused by thyroid tumors, which are located from the ventral side of the neck to the chest.

2. Thyroid adenomas are usually less than 2cm in diameter and thin, transparent cyst-like, and some are larger. Among dogs, Boxer dogs are most susceptible to thyroid adenoma.

3. Clinically, it is characterized by high metabolic rate syndrome, high nerve excitability, and goiter. It's common in cats and occasionally in dogs.