roadrunners do not like to fly and instead forage on the ground they are known for hiding in cover and then ambushing prey by chasing after it they may leap or fly for a short burst to catch insects when they catch a snake they will hold it in their beak and bash it on the ground to kill it
Secondary hyperthyroidism is characterized by elevated levels of TSH, freeT4 and/or free T3 levels. If the free T4 level is normal but symptoms of hyperthyroidism are present along with a suppressed TSH, T3 toxicosis should be considered and a serum free T3 level should be determined if not ordered initially.
Low TSH induced hypothyroidism. Secondary and Tertiary hypothyroidism. Primary hypothyroidism means that there is a problem with the thyroid gland itself. It is unable to make enough thyroid hormone. The term secondary hypothyroidism refers to a disease of the pituitary gland. If the pituitary does not making enough TSH to stimulate the thyroid gland then the thyroid is not going to make enough thyroid hormone.