Ayup, that sure looks like MASSIVE condensation from lack of ventilation. (It could potentially also be partly moisture from roof or wall leaks, so you would want to doublecheck that as well - if the OSB is moisture-laden from leak sources, it doesn't take much extra chicken-source moisture to cause bad problems like that.
Go get yer Sawzall or other weapon of choice, and cut some big ol' vents in that coop, pronto!
I would make suggestions about how/where/am't except that I'm afraid I can't get a real good idea of the size, shape and structure of your coop from those pics alone -- any chance of some more general 'this is what my coop looks like' type ones?
Pat
Go get yer Sawzall or other weapon of choice, and cut some big ol' vents in that coop, pronto!

I would make suggestions about how/where/am't except that I'm afraid I can't get a real good idea of the size, shape and structure of your coop from those pics alone -- any chance of some more general 'this is what my coop looks like' type ones?
Pat