And look! It has grown wings! It must be close to maturing.
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 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.
Yukito is sometimes teased by some of the girl hatchlings for being a "mama's boy", as he adores his mother (and she in return) and is often found in his presence. He also doesn't mind hanging out with the girls, which makes the other boys wish he'd grow a bit more backbone and act more like a man. It's doubtful that will happen, as Yukito seems quite content to be the spoiled baby of his family and the group of dragons in their area.