They been pretty fine since i rescue them from their mother since 11/08/11. Growing big now, one of them is looking pretty sick to me. I observe them for a quite a while and the sick one seems to be eating, but a bit later on, i catch the sick looking one and feel its crop and its empty, when i observe it, it seems to be eating a lot but after that when i touch the baby chick's crop, it doesn't have anything in there. But the other one that isn't sick has a pretty fill crop. At first i thought maybe it's not much of a eater, but as time went by, the sick looking baby chick kept hurdling, sleeps a lot, but still plays around acting normal, but it doesn't have anything in his/her crop. I mean at first i thought it was nothing, but now it seems to be getting worse as its starting to get weaker. In the beginning when i was quite worried it wasn't eating much, i put some Poultry Nutri-Drench drops into their water and watch them drink it, but it doesn't seem to do anything, its appetite isn't getting any better, then couple days later, i check the sick chick again and it got quite skinny from the touch of it's thigh, so i fed the sick baby chick little drops of tylan 50 in through its mouth, but that doesn't seem to have work at all. I think i'm all out of ideas, i mean i don't think it's worm, is it? I'm so confuse and helpless that i can't seem to help the baby chick at all. They are 8 weeks old now, if you have any suggestions, please do tell, i don't know what to do anymore, seems like i'm just waiting for the baby chick to fade away, well here's a picture of the two baby chick, the one on the right is the sick one.