Were you able to get rid of the mites? It took me a long time to get rid of them.I usually take out about half of the deep litter out of the chicken coop come spring and spread it around my blueberry bushes and straw berry plants plus in the flower beds spread all over. During the year in my duck and goose house i use deep litter too but everyday I do remove the soiled bedding it usually not much but having 15 water fowl it can add up in a week, that I go ahead and spread out around bushes and what ever i see may need some mulch. I haven't removed all the DL in my chicken coop in about 3 years. The only reason I did it then was because I had a mite infestation and was told I needed to completely remove all litter to treat the coop and kill the mites.