Composting it may well be the best approach of all-- and if collecting manure from wild rabbits I would definitely compost it before using it on my garden just in case there could be diseases lurking in it.
I made a couple of 'mini-composters' by drilling some holes in the bottom of plastic buckets. I create layers with garden soil, rabbit poop and hay, a bit of half-finished compost, coffee grounds, eggs shells, and whatever else I have hanging around. When it is full I water it a bit, put a lid on it and let it sit in the sun for a few months. If it gets really dry I water it but otherwise I just leave it alone. The holes in the bottom provide drainage, and allow worms to enter the bucket; the worms do most of the heavy lifting for me. Then when I am redoing flower containers or mixing up soil for transplants I add a bit of this nice rich mixture. I know many sources suggest top-dressing with compost, but I prefer to mix the compost in so I don't get weed seeds germinating on the surface.