My chickens seem to be confused about going to be at night now that the evening gets darker sooner. They used to get in their coop about 900 at night, but now that it is dark at 600 PM, they just huddle on the ground in front of their door to their coop. They don't seem to know where they are. Now that it is cold outside, I am worried about them getting cold, so I put a 250 watt red light in their coop and it also freaks them out and they won't go in. What am I missing. This is my first year with chickens and I am worried about my girls.