After building the rabbit hutch, my wife and I built a couple of hide-away boxes for the rabbits to get into. The box also acts as a birthing box, a place to get out of the cold winter wind, and a place to get off the wire of the cage.
The problem is, the rabbits have been urinating in the box.
The floor, the walls and the bedding material are soaking up the urine. This is creating an unsanitary situation for the rabbits. Something has to be done to fix the problem. So what I did was remove part of the floor of the box.
From what I am observing the rabbits tend to urinate and poop in the corners of the box and cage.