With only two chickens I don't understand why they absolutely have to lay in the same box. I have more than one nestbox but God forbid my hens have to lay at the same time. Chaotic drama ensues. My Delaware is unwilling to share , gets agitated and chases my cochin out. Cochin makes repeated attempts to lay in the same box. Delaware gets even more upset , to the point I have to shut the nestbox door and let her lay in peace. There are other nestboxes elsewhere in the coop (in the covered run) and I try to put my cochin in there but she only wants to lay in the same box. Whoever is laying has to listen to the other pacing back and forth while cackling non-stop. Kinda reminds me of when you gotta go and someone else is in the bathroom! Can it be unhealthy for a hen to "hold it in" while waiting for a particular nestbox?