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Thyroid Hormone Tests. Guide. Thyroid hormone tests are blood tests that check how well the thyroid gland is working. The thyroid gland makes hormones that regulate the way the body uses energy. The thyroid gland is a butterfly-shaped gland that lies in front of your windpipe (trachea), just below your voice box (larynx).
A thyroid level test is a blood test that allows the veterinarian to evaluate the function of the thyroid gland. Thyroid tests measure the amount of thyroid hormones in the blood. Thyroid hormones are responsible for the regulation of cell metabolism in the body. A thyroid level test is a blood test that allows the veterinarian to evaluate the function of the thyroid gland. 2  Blood is drawn from the pet and sent to a laboratory for the measurement of thyroid hormone levels.