I have a group of 18 mostly a little over 4 week old and a few 3 week old chicks that I currently have in a stock tank with a heat lamp. I have been turning the heat bulb off most of the day as it’s in the mid to high 80’s. At night it’s in the mid 60’s. Even at night they tend to not be cold and are away from the heat bulb. I am wondering if it would be ok to go on and move them to an outside coop that is a little bigger but still enclosed on part and sheltered by being next to a barn.