My hen is 7 months old. Not laying yet. Very active. Behavior is normal. Eating is normal. She eats layer pellets, and occasional treats like spinach, collards, greens,etc. Manure is normal. But the past several days I noticed the redness and it seems to be getting worse. She lives with a favoralle (her buddy) and a Orpington hen. She lives in a 4x6 chicken tractor but is free range during the day. The only change lately is weather has gotten below zero and I bring my chickens in the house. I have a pen indoors. Thought I would ask on here to see if it's something simple. If not, she will be going to vet. This is my first time raising chickens. Got the 3 chickens in September, Polly was 14 weeks. These chickies are my pets. Please help if you got any experience in this. The pic on left is now. Pic on right is normal.