Thyroid-Stimulating Hormone (TSH). Guide. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called thyrotropin-releasing hormone (TRH). TRH then triggers the pituitary gland to release TSH.
A Raven is black but depending on which way the light hits it they change to other colors like bluish, dark red, or greenish. There are white Ravens but are not albino.
Briards come in three colors: tawny, grey and black. Tawny is the most common color in the U.S. A tawny may have gray or black hairs in its coat but it will still be considered tawny if it is tawny on any part of its body. One common variant is the dog that is gray or black on its back with tawny legs and feet.