I have these great nest boxes for my Muscovies, they're solid, closed in with a hole in the front for an entrance/exit. I have the BEST hatch rates in them, one of my girls just hated 12 babies out of one today (she still has 1 egg under her but might be bad). Zima went broody in one of these boxes, they're about 2" x 1.5".... Zima was dutifully sitting on her eggs last night and when i checked on everyone before bed, i pulled one girl out of zimas box & off zima....well what do I find behind this girl!?!? ANOTHER GIRL!!! 3 muscovy hens stuffed themselves into this ONE box! How can i stop this craziness?? I just built 2 new open top boxes for them, moved one hen into one, she's stayed like a good girl. they're ignoring the other new box & eggs in it though. Hopefully Nibb;es will abandon her box soon so i can TRY to move one there, but this is driving me nuts... I want Zima to have a good hatch, this is her 2nd time brooding this year and her first clutch didnt hatch but a few.