I just took over a number of commercial properties that have had seed planted within the past 1-2 years depending on the site. A few of the properties have this damage and its identical. The only thing is, they are in different locations and some is worse than others. Here is one of the worst spots. Everything lines up to me to appear as Vole damage but the only difference is the trails aernt very deep. They are just down to the soil layer, not in the soil itself. The brown grass is just sitting there, you can rake it up and there are new shoots of grass coming up but very thin. Also, I beleive the little balls are the droppings. not sure, they are found where the evergreens look as if they have been trimmed. Let me know what you think.