I have a friend in FLA that bred her savannahs and just hatched a bunch of fat healthy babies
To the OP, pick up a thing of reptical multi vitamins and give your little guy some high grade raw ground beef sprinkled with the multivitamin every day. Take the left over beef out after about an hour and toss it. This is what alot of breeders start hatchlings on and it really helps to beef them up and keep them healthy.