Congrats on a nice litter, this year I offered chopped worms and chopped rosies, most ate with in 3-4 days, some 2nd day after birth, some took a week, and a few held out for live, which after a 10 days I usually cave and offer a live fish or tadpole and that usually does the trick, but then convert off live ASAP. Waiting 3-4 days to offer seems like would be a prudent average for most of the litters I have produced in the past. After a few weeks and they get fat and happy and bulletproof I start mixing pinkie parts in and slowly switch over to rodents. I think I will give a night crawler as a regular treat but keep rodents as the staple. Good luck with them and have fun watching them grow and mature, both in terms of size/looks and personality.