After a few seasons of blight and powdery mildew I built 9 raised beds in my vegetable garden last year. The beds need to be topped off with more soil this year. Would it be a good idea to shovel some dirt from the chicken run? Last year we had mulch in the run (the free kind from a tree service), and it's pretty much broken down. I've been tossing bedding from the coop out all winter as well. If it's not a good idea....what should I add to the beds this year? I'd prefer free options...I had to buy a dump truck of dirt last year.