Thanks! I have my bunnies inside so they use a litter box but I was thinking about putting a grate in there and covering that with straw so that I can separate the poop from the wet hay on the bottom. I'll have to experiment.Oh I remember what I did with the Contraption manure that was separated from the urine... it went straight into a worm compost. The worm compost was thrown into a chicken run for chickens to scratch up and find worms and bugs to eat. Then eventually I shovel out the runs and compost it. Worms hate rabbit Urine. The Urine I just through some straw down under the cage to soak up the odor.