If your dog seems sluggish and has a puffy-looking appearance, it may mean he has problems with his thyroid. The thyroid gland produces various hormones including T3 (liothyronine) and T4 (levothyroxine) that help to maintain a normal metabolism Hypothyroidism occurs when there’s a deficiency of the thyroid hormone. This problems happens to people as well as dogs. The thyroid hormone (also called thyroxine) affects virtually all organs in the body. The deficiency happens generally when your dog’s immune system destroys his thyroid gland. More than 95% of all cases occur as a result of the destruction of this important gland. This vital gland sits just under the throat. The technical name for this problem is autoimmune hypothyroidism. Sometimes the gland simply wastes away with no known cause. This condition may be present when the puppy is born, in which case it can lead to a type of dwarfism. Cats may also face this problem but it’s much rarer. It may happen if the cat has been treated for hyperthyroidism with too high a dose of medication. Dwarfism is extremely rare in cats. Risk factors and identification. Sorry the complete article is only available to our Premium members. Please join us now. Copyright Pomeranian.org. All Rights Reserved.