This hatchling appears to be... dead?

Perhaps not. It seems to be active during the night.

Young dragons are relatively defenseless. They are born with relatively soft scales, which are shed and replaced with harder ones as the hatchling matures. Once a hatchling’s wings grow in, it typically marks the beginning of maturation. At this point they are often capable of hunting on their own and are usually left alone by their mother.

Bitten as a hatchling, Nystophe is eternally frozen as a hatchling. Bitter and angry with his life stolen from him, he is less cruel and bloodthirsty than the others in the coven. A loner in the pack, he is often by himself, missing his family and his stolen adulthood and cursed to roam forever with the undead.