I don't have much experience with hatch-lings, but I did pick up some 4 day old females at our last show. I fed them right after their shed, and the bigger one eats like a champ. The smaller one is pretty picky. I used live thinking the movement would help, but I just dangled it in front of her, and after striking it about 10 times she finally took.

I feed them every 5 days and the smaller one always takes awhile to eat hers. I would say just keep trying, eventually they'll get it. What size are you feeding? And, are you using live?

Hopefully some of the more experienced with chime it, I would love to hear how they do it.