I'm at my wit's end about this - for about the past fortnight, my two chicks, now 5 weeks old, have started loudly chirping when it gets to about 5pm. One chick is louder than the other, I wonder if she's the one starting it, and setting the other off, though the other chick doesn't get as agitated as her. They can go for hours, despite my going to them - they have a heat lamp, are indoors in a makeshift enclosure with roosting spars, fresh water, plenty of food. I had wondered if they were seeking attention but when I go to them they continue to loudly chirp. I'm trying to integrate them into their outdoor pen - they are happy there throughout the day but come 5pm, they start their loud chirping. So I've been bringing them inside, fearing that they're cold out there as they're not quite 6 weeks. Can anyone help? I again stress, they are happy and healthy looking all day, they just seem to become incredibly agitated at dusk. Thank you.