There could be several reasons for this. Your temperature could be too low...as your humidity. I can't remember or not if you mentioned the species you have, but they all have their preferences. The most common thing that I've found, though, is how you present the food. Some babies will eagerly take food from your fingers. Sometimes certain species more than others. But, most are rather shy at first. They like to eat where they feel secure and secluded. Also, the food has to pique their interest. It is quite possible that if you found this baby just this spring, it may have overwintered in the nest. It may just not be ready to eat yet. Keep it 75-80 degrees and well hydrated. My failsafe is to offer picky feeders cut up earthworms in VERY shallow water. I cut them up mainly because they'll crawl up the sides of the container, but leave them large enough to crawl around and look yummy. This year, for the first time, I got a few reluctant feeders to start on Phoenix worms...they love these little things! Try to trick the turtle into thinking that you're not around when offering food. If it's not fooled, just leave for about an hour. If your turtle doesn't eat soon, you should find a good herp vet. Just make sure they have herp experience. Sometimes, you may find that the Vet techs not only know more about herps, but they're very willing to answer husbandry questions over the phone. Good luck! I think most of us have been in your shoes at one point, or hundreds of points!