Would this be feasible? My pet chins are housed in cages with wire mesh bottoms right now... I'm wondering if instead of using wood shavings in the pan to absorb the urine, what if I just filled the pan with dirt and grass seed, or some other kind of plant? It'd be low enough that the chins couldn't eat it, and I can just cut the grass when it gets too tall. Then the pee and poo could be used as fertilizer for the grass growing underneath them, and I'd only have to wipe the caked up urine on the mesh every couple of weeks, and water the area where the chins don't pee...