Some quotes follow
Rabbit manure is the best manure for your organic gardens! It will increase poor soil by improving soil structure and also improving the life cycle of the beneficial microorganisms in the soil. Rabbits are very good at producing an excellent source of manure. It is rich in nutrients and very simple to use. One doe and her offspring will produce over one ton of manure in a year.
Rabbit manure is packed with nitrogen, phosphorus, potassium, and many minerals, lots of micro-nutrients, plus many other beneficial trace elements such as calcium, magnesium, boron, zinc, manganese, sulfur, copper, and cobalt just to name a few.
N – P – K VALUES –
Rabbit 2.4 -1.4 -.60
Dairy Cow .25-.15-.25
As you can see the nutrient values of farm manures and how they measure up and rabbit manure really shines! Rabbit manure also doesn’t smell as strong as other manures making it easy to use.
Putting it into the compost before using it can be a way to get rid of any pathogens in the manure. It gets nice and hot, killing any bugs, while retaining it's usefulness as a fertilizer/soil amender.
2. directly in garden
Rabbit manure can be used as is, it does not have to age. it is a cold manure.
From the vegetable gardener: I like to think of them as time release capsules, as the pellets don't completely break down right away. It's slow-release thing. If the pellets are urine-soaked, (which they usually aren't) you can let them dry out a bit or just fold them into a couple inches of soil. As they do break down, they build your soil's structure, improve the porosity, add stability, and hold nutrients for plants as well as other organisms in the soil.
Find a five gallon bucket, and a large scoop of rabbit pellets and drop them into the bucket. Give it a good stir every now and again for a day or two.
Many a rabbit raiser uses the manure of rabbits to raise red wigglers. This provides two things: quick breakdown of the manure, and as the worms mulitply, a secondary source of income.
5. Fish food
I read somewhere on a forum about a guy who set up his rabbits over a pond in which he raised some type of fish. It was a free fish food that apparently worked quite successfully.