I wouldn't be concerned, but for some reason, my girls never seem to have a full crop, and 2 of them are in a pretty hard molt. Also with only 5 girls (in a 4 x 8 loft coop), they don't put out a lot of heat. Over all, they should be fine without heat, but they just don't seem to be eating as much as they were in the early fall, when at the end of the day, they all had a full crop. Some of my girls are now going to bed with empty crops. When I palpate them, their bodies don't seem to be as filled out as I would expect them to be. Their keels are very prominent. I don't think there's a parasite load. treated them with Ivermectin x 2 in August, and no signs of mites, never seen a worm. Poo looks normal though much smaller and dryer, again this associated with their decreased appetites. Your suet cake idea is good. I hesitate to give them a lot of fat, b/c of a warped sense that what's not good for me is not good for the chickens... need to get over that. I know that fat calories would be good for packing on the weight, I just need to get over myself about that! I have quite a bit of turkey fat. that I can skim today, and have been giving them occasional meat scraps, probably no where as much as they'd like to have. What's wood pecker feed? Thanks Jazor.