I have a Cornish X chick 4-5 wks old. Was fine, strong & eating well. When I came back from Memorial Day weekend, he/she was on his tummy and flopping to get around. His feet seem awfully big - can't really tell if they are swollen. I feed chick starter, water with a drop of vinegar in it, and chickweed starts pulled from the garden area with dirt on them. I also give the chicks sand/dirt from my yard for grit, along with oyster shell ground up as much as I can. Last night I separated my other 3 chicks from him, don't know yet what his poop looks like. They are bedded on oat straw - just changed the bedding so it is pretty fluffy and even harder for him to get around in. I put some ground up magnesium/zinc vitamin pill on his greens but I don't think he has eaten much of anything since I put him in the new cage. His toes are curling in a bit. Is he growing too fast? Should I be withholding food for 12 hours at a time? Please help!