I have to agree that the smaller one is way too thin. It would be a good idea to have him checked for parasites as venom508 mentioned. I suggest you still offer live crickets and also the good greens/veggies from the beautiful dragons site but also supplement with some chicken baby food as well as some squash baby food. Since he isn't eating much, those will help to give him a boost. Thin the baby food mixture with a little bit of water, add a small pinch of calcium to it and heat in the microwave to take the chill off. Then use a plastic medicine dropper or needle-less syringe and put drops on his nose that he will hopefully lick off. Once he gets a taste of it, he should really like it. Babies can go downhill very quickly, so you need to act quite fast and be sure to keep him very well hydrated. When do you think you can get the digital thermometer with probe? How close is he to the Repti-Sun fluorescent bulb?