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.

Raizel Jr is almost always seen with a bloodied mouth. This has resulted in him being accused of the deed whenever a dead hatchling lies about in the royal palace of Sindria. He is fiercely defended by his parents, though, for the Noble family is well aware of the fact that the 'dead' hatchling is his baby sibling and his bloodied mouth is the result of his rapidly growing fangs, which he can hardly get used to.

The Dark Green dragons don't seem to buy into this though, with their horde jumping at every opportunity to grab him with their vines, planting him in front of his baby sibling's 'grave' just so they could force out his 'confession' to a crime he never committed. This has always ended with the hatchling screaming in terror, sinking his fangs into their dragon grass, much to the horror of the horde and the entire palace.