I got (my first) hens about a week ago. It has been a very cold winter so far and had gotten down to -10ºc the days before they arrived. Luckily when they did arrive a warm spell happened so it was +4ºc for a couple days. The breeds I got are: 1 black rock, 1 brown hyline, 1 bluebelle, 1 buff sussex The buff is the youngest, the rest are about 5 months, the black rock and the hyline the biggest. When they arrived the hyline being one of the largest was bold and confident, jumping out of the coop and getting to food first, often pecking away the smaller ones. I even saw it perch on top of my 8ft fence. But I also noticed that it kept doing what I would describe as a cough/sneeze. A sort of spluttery noise where it would shake its head. All was well till the cold came back, with a load of snow! Its been -5ºc or so with deep snow for 3 days, and ive noticed the hyline lose all confidence. For two days it came out of the coop with the others, but last night it didnt come back in the coop by itself. Instead she was hiding in the gap under the coop where she had been for most of those two days. Only venturing out briefly to eat once, then coming to shelter/hide under the coop on a cold concrete surface for the rest of the day. This morning she never came out of the coop! I gave her a good long time while the others where eating all the food, but she stayed perched so I placed her with the others manually. There she began eating with the rest looking normal. The snow all fell on the first day, so it is not snow falling that she is sheltering from. Plus it makes little sense to hide under the coop when it is warmer inside the coop.