The longer the body is exposed, the worse the condition gets. Frostnip is the condition when only the outer layer of skin is frozen. It looks white and waxy or gray. Superficial frostbite is the condition when the skin is frozen and the underlying tissue is beginning to be affected. The skin is white or gray and feels hard while the tissue underneath feels soft.
Deep frostbite is when the frostbite extends down to the tissues and muscles.
It looks like frostnip and superficial frostbite but the area is hard. Prepare by allowing frozen chicken to thaw slightly. Remind students that the frozen chicken is an extreme case of deep frostbite. Allowing the frozen specimen to thaw slightly may provide better results. Comparisons of frozen and thawed specimens are also valuable.