UPDATE on the chick: It's walking upright, a little "drunken sailory" but still doing 100% better. Kerry got home and said if I hadn't pointed the chick out she wouldn't have known it was sick.
He did get knocked down by a sibling but once we flip him over again he's all set.
We are feeding electrolytes.
Besides this chick, Kerry also noticed a different one with a weird foot. It's a silkie so they have 5 toes. This one has 4 toes, but it seems like the 2 outside toes are fused together and he/she keeps the toes clenched. Not sure what we are going to do with that one...
I've never had so many problems! Out of 30, only 8 made it to the end, and only 6 hatched (one pipped but died in the egg)! And now two seem deformed

Maybe they are just wicked inbred