Hi Everybody! I live in Reno where the nights get down to the teens often and sometimes down to higher single digits. My 4 Delawares have a rubbermaid shed with a roost in it, plenty of bedding and I stuff the door opening with straw on the cold nights to keep it warmer. I feed them layer pellets, occasional scraps and a nightly treat of safflower seeds, millet, flax mixed with a little scratch. When I pick them up I can plainly feel their keel (?) bones but I am not sure if this is how they are supposed to feel? They are eating A LOT more pellets than they did this summer and I am just confused as to how to determine whether they are too thin. They look gorgeous otherwise, shiny and full feathered. Please help if you can tell me how to gauge their weight and whether I should be feeding a different type of pelleted food? Thanks, guys!!!!