Last weekend I put our 4 wk old chicks out in the coop in a cage. They have a lamp on at night for heat. The temps have ranged from 60-80 during the day and 45-70 at night. I noticed that for the past two days my bantam chick has been quite and puffed up. Now usually this one is spunky. I brought her in last night thinking maybe she was cold. She seems to have bouts of perking up is still spends most of her time sitting and puffed. Her poo's look normal. Even thought she is eating/drinking fine, she seems to have lost a bit of weight. The other chicks she was with behave and act normal. To the best of my knowledge she hasn't eaten anything bad. Though when I went out last night to get her, I found a mouse had gotten into one of the feed bins. Is it possible that for some reason this one has gotten a chill? If so, how long should I keep her in the house? Will she be ok?