Rabbit manure is magical stuff, at least to any avid gardener, homesteader or farmer. It's dry to the touch and smells like whatever they've been eating. I feed my rabbits a diet primarily made up of hay, foraged greens and wheat fodder. This handful of bunny berries smells like fresh green hay.
Mixed in with the manure is a certain amount of urine. Rabbits use the same spot in the cage, hutch or field to relieve themselves. You can train a rabbit where to deposit its waste much like you can train a cat how to use a litter box. Rabbits urine can be a rainbow of colors, and the color can change often, depending on what they are eating that day.
The manure has a diversity of major and micro nutrients (minerals) with an NPK (Nitrogen. Phosphorous, Potassium) of 2.4-1.4-60, making it a well balanced manure. It's also a cold manure, meaning it doesn't need any time composting before it can be used. It can be added directly to garden beds, dug into the soil, used to brew compost tea. Dense with micro-nutrients and organic matter, it improves soil structure, drainage, and moisture retention while also adding to the life cycle of beneficial microorganisms. It will attract and/or sustain worms in your soil, which is always a good thing.
Our primary way of using rabbit manure is to let it collect in the hay bedding in each rabbit hutch, along with their urine and hair. Every few days the hutches are cleaned out of the manure rich straw, which is tossed under the hutch until it's needed. When we are mulching around the base of trees or in rows of annual and perennial crops, we utilize the straw that has been collecting under the hutches, adding a 2-3" layer of that straw to rows or around the base of fruiting trees. You can read more about that here.
A more common way to use it is to collect it from under cages and hutches where no hay bedding is being used. The manure collects in piles on the ground and can be shoveled directly into beds, rows, around trees etc.
You can also make a compost tea by putting a good shovel full of manure in a porous cloth bag, like a burlap sack, tie it close and put the bag in a 5 gallon bucket and then fill the bucket with water. Let the bucket sit in the sun for a week then pull out the bag allowing it to hang or rest above the bucket until it's done dripping. To speed up the same process, put the manure directly into a bucket (no bag) and stir the bucket daily for 72 hours. Strain out the solids from the bucket and it's ready to go.
To make a compost tea concentrate use 1 part manure to 5 parts water following the same directions for making compost tea. To use the concentrate, dilute one cup of the concentrated tea to one gallon of water.
You can get more simplified for smaller amounts of tea by putting a handful of the manure into a small porous bag and use a twist tie to close it. Drop the bag into a watering can and let it soak in the water for a week or more and use. This method is perfect for watering indoor plants once a week or so.
We originally got into raising meat rabbit for their manure production. When I realized how much manure I could collect from a doe that had kits, I upped the number of breeding does I keep solely for the manure production. That we could eventually butcher and have the rabbit meat for our table was a thought that came me to later as my focus was on their ever so magical manure that I wanted in large quantities. I'm happy to say that 22 breeding does provide me with as much manure as I can use every year.