I have 14, 8 week old "barnyard mix" chicks. After taking them from the brooder to the coop, I noticed a few of them walking funny. They were "high stepping" so to speak and their toes seemed to bend upwards instead of the usual claw formation. Only about 6 out of the bunch are doing this. I went to inspect them and found that the under side of their feet seemed to be in bad shape. Cracked in all the bends and discolored. They have pine shavings inside the coop and straw in the run. This appeared before the temps dropped but the coop is heated since they are still small. This is the same clutch that had some born with wry neck and curled feet but the ones born with curled feet are not the ones with the issues now. I am at a loss. Any suggestions on what is causing this and how to fix it? This is not my first hatch and I have always done it the same way.