I'd definitely cut out the oat meal and scratch, its not doing any favors to their health. You can make a mash out of chicken feed if you want a warm treat.We actually got down to -3 last night, and -12 is on tap for tonight. That is very unusual for this part of Tennessee. I did enclose the coop pretty well, but I'm going to go put up another wind shield to prevent a draft. They have great ventilation, but I don't want a draft going through there.
We do give them warm oatmeal each morning, and their food is kept full. The water barrel doesn't freeze, but the little water cups do, so I always bring hot water with me to pour in and thaw the water cups.
I gave them a big helping of scratch yesterday and also a good batch of mealworm. We also feed them pretty much any leftovers we have every couple of days. They seem to be very happy, although I'm no chicken whisperer. They are active when we visit them, and they love to jump up and get at whatever it is we are bringing them. LOL They are so cute!!
We have six, but we're going to get more in the spring.
Stay warm, friends!!