Check the listing for details. PetAlive Thyroid Soothe Granules. Color: See Description, Condition: New, Made in US. Listed at 43.50 USD. Symptoms of an Overactive Thyroid in PetsThe thyroid gland consists of two small lobes shaped like butterflies, one on each side of the windpipe (trachea) located in the neck. This gland produces thyroid hormones whose primary function is regulating and maintaining your pet's metabolic rate, in turn affecting their overall health and wellbeing.Another hormone, called thyroid stimulating hormone (TSH), is produced by the pituitary gland and controls the production of the thyroid gland hormones T3 and T4. If the thyroid is not functioning properly, there could be an impact on your pet's body weight, heart rate, skin and coat, digestive, and reproductive health.Hyperthyroidism can affect middle-aged to older cats (between 4 and 22 years of age), seldom developing in dogs. When hyperthyroidism.