I don't know about anyone else's piggies but mine tend to pee right under the hay rack because they spend so much time there. I put a litter box below the hay rack and it collects about 75% of pee. This might help with hay being attached to fleece and absorbing pee. I use CareFresh in the pan. This is not a corner pan but more rectangle with a high back and low front. Don't know if this will help anyone but good luck!:cheerful: