I dry it under a 400watt HPS. Im planning on using a pellet machine to turn it into a pellet fertilizer. I was thinking of mixing coconut corer in with it too. The coconut corer has potassium and the left over hay has a good source of Nitrogen in it. Rabbit Manure contains 2.4% Nitrogen, 1.4% Phosphorus, and 0.6% Potassium. This would be a great worm food too.