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.

At the heart of mischief and mayhem is Penelope. She's well-known for pulling practical jokes and tricks on others, being the prankster she is. Her mischievous streak doesn't help this, either, in fact it only boosts her naughty and playful side. Penelope seems to have inherited one of her sister's most outstanding features; her stubbornness. So it's not unlikely to have Penelope do the exact opposite of what you ask her to do if she doesn't like it.