Not sure if my hen is sick or not . She is a red sex link and I noticed she is a lot lighter then the other chickens. I noticed her because of her beak this week had a weird chip out of it (I got hem with their beaks trimmed so the top is much shorter then the bottom which had the chip) I was worried it was affecting her eating so I trimmed it slightly just to even it up . The temperature has dropped her this week in ontario to below zero Celsius at night and during the mornings . The coop is insulated and they are locked in at night so their is no draft, but she is the only one who is puffed up and her wattle looks paler and more shrivelled then usual. Puffed up during the day as well where everyone else looks normal and she is the only one to tuck her head while she sleeps. I have been bringing her in the house the last two days just for a few hours and feeding her a fatty snack ... I'm wondering if her beak was an issue and now it is better since its been trimmed up ..she ate like a little piggy . They are about 10 months old .. This is their first real winter and did not molt this year . This is also my first winter with chickens. I checked for lice and mites and all look clear ...any advice ?