Dragging the breeder pen would spread the deer waste which should accelerate decomposition. But will the thinly spread waste create a bigger problem if the deer are grazing over the same ground?
As small as deer pellets are, I have never needed to worry about the decomposition of the feces. One good rain and a few hot days, those suckers are gone !!
I would just lime the area and not worry about dragging the pens.