May be splayed leg? I had to use a band-aid on one of my chicks on a previous hatch. Cut it in half horizontally, found the instructions here on BYC. It was fine in a couple of days, but you have to do it-the sooner the better. You have to keep checking the Band-Aid to make sure it's not to tight. I had flexible band-aids so it worked perfect. The width of their legs grow so fast, you don't want to cut off the circulation.Well this was not my best hatch,but here's the breakdown..
45 eggs set
29 went into lockdown originally, but missed one when candled at the end.so 28
12 chicks hatched,2 died,one at 1 day old, the other 2 days old.
They were set to hatch jan 31 after 6pm, they all hatched jan 2,3and 4!
I have 1 chick with what looks like a hurt leg, but is eating and drinking and getting about with it's injury.
10 chicks is only about a 33% hatchrate of what makes it to lockdown. With the 110 temp spike over what could have been up to 12 hours, i'm lucky any made it at all, so still considering this a good hatch!
I will update with pics as they grow! Congrats to all the new lil fluffy butts! Stay warm!!