Should I feed now or wait until after first shed?

I know I need a scale (my old one broke and I still haven't got a chance to replace it)... so, I think it depends on how much they weigh?

Okay, the snake is much skinnier than his brother who absorbed all his yolk but is now more active than before when he was still attached to the yolk. Lifts his head, flicks his tongue, and crawls around.