Okay, I have three chickens. 1 speckled sussex roo (will be 6 months on Nov. 21), and 2 leghorn (1 brown, 1 white) hens (5 months old on Nov. 12). The rooster seems big enough, but sometimes I think he's smaller than he looks (that maybe it's just the feathers making him look big). And the hens are still smaller and on the thin side. I often give them treats (dry oats, scrambled eggs, and corn). I wonder if it would be good for them if I fattened them up for the winter, and if so... what are healthy ways to do so? On an all day basis, they are all eating layena laying feed. No eggs yet. Not sure if they will until spring. We're not using artificial light. This is our first winter with chickens, and I'd like to make sure they are healthy and strong throughout the winter. We have closed the top of their run with wood, and put plastic around the sides and over the wood. There are gaps that will allow moisture to escape. The coop is inside the run, and has a tarp over it. It also has heating pads inside of it, under the straw, to help heat it. It also has an 8 ft long gap across the top back to help moisture escape. So, my main thing I'm working on now is making sure I am feeding them appropriately for the winter. Thanks to all who respond!