Last night I added a nestbox, complete with 3 golfballs, to my juvenile coop. The girls are now 16 1/2 weeks old and I figured I'd give them some time to get used to it. I intend to add more, but I use covered kitty litter boxes as my nestboxes and the store only had one yesterday (going to add five more when they restock). Anyhow, I just went out to check on the juvies because I noticed very few of them outside. I found 8 of the girls standing in the coop, staring at the nestbox. They'd stretch their necks to peek inside, turn and look at each other, then strain to peek inside again. Been there since about 6 PM yesterday and they just now noticed it. Chickens are weird.