Corn hatchlings do feed on small pinkies. My little Trixie (had to change from lil Booger!), has the smallest little head and was only 1 week old. I left the pinky in the cage and *poof" it's gone by morning. I fed the first live, but have subsequently fed f/t with no problems. It's amazing since their heads are small that they can actually get the pinky down! Good luck with the little one.