First and foremost thank you all for your help. The last two days we have experienced a cold snap with temps at night easily falling to 30 deg. This morning I woke up and found 6 of my chickens (large breeds, 2 roosters and 4 hens all around 8-10 months old) lying on the ground. When I went to pick them up and set them back down they act as if their legs don't work anymore and they flop down with their legs sprawled out. I have checked for signs of bumble foot and I did not notice anything out of the ordinary. I thought that it might be frostbite, but their combs and wattles are ok. What is wrong with them? Today I moved them out into the sun and placed a shallow dish of food and water in front of them and they ate and drank, but did not move otherwise the rest of the day. Tonight I have moved them all into a smaller area with a heat lamp on them, but I still have not seen any improvements. Any ideas? Thank you! Your suggestions are greatly appreciated.