Ive had rabbits for many years--first New Zealands and then Flemish Giants.
http://countylinerabbitry.webs...
The thing about rabbit poop is that it doesn't need to be composted, it can go directly into the garden--its not 'hot' like chicken, horse, or cow manure. Also since rabbits use a lot of hay, the poop is already mixed with hay. You will rapidly accumulate plenty of organic material--that is ready to go, no composting required.
