The suggested initial dose is 0.5 to 3.0 mg levothyroxine sodium (T-4) per 100 lbs of body weight (1 to 6 mg per 100 kg) once per day or in divided doses. Response to the administration of ThyroVet™ Powder should be evaluated clinically until an adequate maintenance dose is established. In most horses, the total daily dose of T-4 is in the range of 6 to 36 mg. Serum T-3 and T-4 values can vary greatly among individual horses on thyroid supplementation. Dosages should be individualized and animals should be monitored daily for clinical signs of hyperthyroidism or hypersensitivity.
ThyroVet™ Powder can be administered by mixing the daily dose in the concentrate or by top dressing on the grain, preferably rolled or ground. To facilitate the proper adhesion of ThyroVet™ Powder to the ration slightly moisten the grain with water or a liquid supplement.