Baby Leopard Gecko sick. Help?

first off if you dint know the , separate them immediate. two males will fight to the death. second leos are nocturnal so you wouldn't see them really go at it during the day, third if there is a huge size difference the larger one is capable of eating the smaller, last , depending on the substrait your baby gecko could be bound up with sand if that's what you have. sand is not good for geckos AT ALL!, also there could be improper light, improper heat, improper vitamins.or the crickets could be to big? there is so many things thet could go wrong with geckos its crazy. but if hes not at the point of no return you could go to the pet shop and get "reptile aid" its like a liquid diet you mix up. but its gonna be a pain in the *** if hes not hand tame yet,or before its too late for him you should find someone that has experience with this type of situation and eather give it to them or see if they can help him for a fee and give if back. i have rescued many leos and fat-tails with issues similar to yours and that all are doing fine now, if you want more detailed info email me ggtuna@yahoo.com subject "gecko help"