The First Ability.

She will bring them down for another session of training after they wake up. Then they will eat to their fill again.

This cycle of hunting and sleeping will continue until the younglings awaken their first active ability. 

Dragons are born physically superior to most races. They are strong and have incredible defenses. Their scales defend them from both physical and magical damage. Their dense muscles also grant them strength enough to be at the top of most races. They can also grow to massive proportions, so no one can bully them with size. But those aren't what make them Supreme. 

Those features are just passive abilities. They are the base features that every dragon possesses. It is not until they awaken active abilities that they become worthy of the title of Supreme race.