My chicks are 4 weeks, mostly feathered I can still see fuzzy heads, and fuzzy under the wings. I am trying to get them ready for moving out into the coop over the next few weeks. They have an ecoglow for heat. Do you think it is safe to leave the window open a good amount in the room during the day time hours to get them to adjust? The room temp has been about 65* for the most part for several weeks, they rarely go for heat during the day. I leave the top of the window cracked, but I am thinking of opening it more to lower the room temp naturally. I have the side of the brooder closest to the window covered with a towel to prevent drafts. Our outdoor temps are mid 50's during the day and low 40's in the evening. I love watching them when they hear noises from outside the house, we have had a bunch of crows being very loud lately and the chicks listen so intently its cute!