Because it's their favorite.I still wonder why of the four nest boxes available to them, all eight of the girls almost always lay in the same left-front box.
We have 3 nest boxes for four chickens and they all like the same nest. If it's occupied when someone else has to lay an egg she will squawk and protest loudly until the nest becomes available, then she'll go and lay her egg. I've seen her delay laying and stress squawk in and out of the coop for an hour one day until "her" nest was available.
Chickens are goofy sometimes. The whole nesting thing has never made sense to me.
