A couple time a year the County grids up the green waste recycle pile. It a mix of any and every kind of tree, shrub, grass, leaves, coconuts fronds, even whole coconuts which the girls go crazy over, all thrown into an industrial shredder and give to the community for free mulch.
I go down and get 4-5 garbage cans of the mulch and dump it into my run. I don't even have to spread it out, my girls do that job. I used to take to wire roof off the run and dump it over the fence, but this last time I decided to replace the wire roof with a larger holed 2x4 wire mesh so I can dump the mulch right onto the wire roof and it will just fall through.
Its a blast to see my girls jump/fly up to the roof to get a hanging strand of bark or leaf stuck over the wire. It great to look in the run at a foot deep crater with one of my girls heads barely looking over the edge, scratching and throwing mulch all over the place.
What is amazing is I put 6-8 inches of mulch on the floor a couple times year and in a month or two it is all gone and getting down to the dirt floor. Where i goes I don't know, but I know they sure look forward to piles of mulch to dig and play in.
Aloha,
Cory