I have an old pile of maple leaves that my husband piled in the corner of the yard the last few year and a wooded area that is mostly dropped pine needles. Can I use these in the run? I was thinking of taking a couple wheelbarrows if each and spreading it in the now dirt only floor of the uncovered run. Should the maple leaves be shredded first? Will this bring in a mite or lice problem? I have noticed something has burrowed in the maple leaves. Probably chipmunks or squirrels.