Just curious as to why they might be doing this? The last few times I've gone out to the pen after sunset to shut all the doors I've found all of my birds (28 chickens and 5 ducks) all clustered in a group in one area, against the wall, practically on top of one another. Temps have been above average, high 50's to 60 at night.....the youngest birds in the group are two 5 week old bantys who are fully feathered out, but most of the birds are 8 weeks old. They've been off the heat lamp and out in the pen 100% for a good 2 weeks now; I prolonged the heat lamp a bit due to a late season frost we had in early May. There's an old dog crate, several 5 gallon buckets and some other random wood boxes for sleeping spots but they aren't being used. The crate and 3 buckets are up against the wall right where the birds cluster, and rather than using the buckets, they push them to the side and sleep against the wall. I also have a perch set up (it gets used a lot during the day, nobody's perching at night yet). The pen I have them in is quite large- I'd say 15x25 feet, and most of the poultry netting is covered in that black ground cloth stuff to keep it dark & quiet and to keep predators from peeking in. (The pen used to be a growout pen for a large scale pheasant hatchery.) The wall they're huddling against isn't even the darkest, most "secluded" area of the pen- there are 2 corners that are MUCH darker and quieter, one with a perch, both with buckets and a lean-to for hiding....so I don't think they're trying to seek safety. This is fairly new behavior, unless I've just been going out to shut doors too early to see this (usually I DO go a bit before dusk)....the first time I noticed it, there was a big nasty storm approaching so I figured they were just wigging out from the thunder. Last night was clear, calm and mild, and yet there they were in a cluster. Odd that the ducks get in on it too- since the ducks (and two little black chickies who got put in the ducks' brooder for a while and apparently think they're Cayuga ducks lol) generally segregate themselves during the day. I've been gently picking them up & placing them inside the crate, buckets, etc when I close them in for the night....they seem to stay put. Is this just a habit they'll have to learn, or do I need to provide them with different kinds of sleeping spots??