This inflammation causes damage to the thyroid gland resulting in reduced production of thyroid hormone. (vetbabble.com)
Each autoimmune attack causes more and more damage to the thyroid gland until, ultimately, the gland is no longer able to produce adequate thyroid hormones. (holtorfmed.com)
Your dog pulling with just the collar could cause damage to the thyroid gland. (thecaninechefcookbook.com)