Do you know the measurements? For 2 sows it needs to be a minimum of 120 by 60 cm and for 2 boars it needs to be 140 by 60 cm.
oh my gosh that sounds amazing!Why not take out two or three of the floors, turn it on its side, cut a small hole in one floor (big enough fora pig to get through) and put a wooden door on one end to enclose it. And Hey Presto! You've got a great big, roomy hutch!
You could paint the inside with a pet-friendly paint (perhaps white or cream to make it bright) and put lino on the floor, as has been suggested. I assume you were going to make a mesh door anyway, so you could get inside to clean out?