We bag up our rabbit waste (poops, sawdust, hay and the odd wet newspaper), into plastic rabbit pellet sacks. Then on our regular fortnightly trip to the local tip we just empty the sacks over the wall where all the garden waste, tree pruning and grass cuttings go. All the green waste is then composted by our local council and sold at local garden centres as potting compost. I think they charge about £2.50 a sack for it. So anyone who buys it has a good compost for their plants. They probably don't realise that all their fabulous veg and flowers are probably thanks to my bunnies!!
I don't think we're allowed to do that here. I remember emailing them once, as they make and sell compost, but I didn't get very far, which is why I compost as much as I can myself.