Ok so i am going to try and summarize this all up. Please excuse me if i forget anything, but i am very upset and frazzled right now. OK so, on Feb 2nd i hatched out 5 polish bantam chicks. The first one to zip took the longest and three more hatched while it had stopped. It couldn't get out of the shell even though it had zipped almost all the way around. I noticed the membrane was drying out so i put a straw through the vent of my hovabator incubator and added some water to it. Eventually it hatched out. Then my last chick hatched out, backwards (pointy side). That chick has a very long neck and is also pretty small but he has been keeping up with the others and seems very healthy. The zipping chick, now known as "zip chick" has had a hard time ever since it was born. It ended up being born with an unabsorbed yolk sac. He could still walk around, chirp, eat and drink but had this thing hanging behind him. I had to keep it in a tissue box in the brooder but away from the others so that they couldn't peck it. Eventually it dried up and is below his vent. I finally let the chick out with the others and since then it started doing this loud chirping like something was wrong (constantly). I checked it for injuries and abnormalities and yet found none. On and off it would look fine, then bad, then fine. All along it has not grown at all like the others have. It seems very weak and does not have alot of energy. Its head often falls to the ground. It is possibly a "runt chick". Then it got so eat it wasn't able to walk or stand much and would scuttle across the ground to get places. It looked like it wasn't able to get food and water by itself and was to weak to try. I thought it wasn't getting enough nutrition so i tried to get some polyvisol but no where near me as any. Then i called up my local feed store to see if they had any chick nutrients and they said they had no chick stuff in yet. So finally i was able to get to petco and got "kaytee exact hand feeding formula for baby birds" that i heard you could also use for baby chicks. So i have been feeding it that and water through a syringe. I'm home all day long so i have been frequently giving it water so its definetly not dehydrated. I thought it would have gotten better but its only gotten worse! Its now day 4 and its legs are doing this thing that i almost thought was splay leg but its not. Its almost like its too weak to fully stand up and it often hobbles and falls over. I recently inspected its legs and found that it has weird indent on the inside and outside of its legs that the other chicks do not have. This is the best picture i could get. I know its kinda hard to see. Its not a red line, its an actual indent. I checked and none of the other chicks have this, so it can't be normal. It also falls on its back alot and one time it almost looked like it was seizuring. It twitches and sometimes shakes it head and makes me think its something neurological. I was having hope that it could get better, but now its just looking worse and worse. Sometimes it really looks like its suffering and i don't know what else i can do for it. All the other chicks are fine its just this one. This is my first time hatching chicks and its just really upsetting. I wish i knew what was going on. Can someone please help me!