I'm not exactly sure where to ask this question, so I thought I'd try it here. We just received our 8'x12' Chicken Coop today and are now looking at building the run. The problem is, the Coop was placed near one of the places my family and I target shoot with .22 rifles. Of course, we won't be shooting in that spot anymore. But I am concerned about building the run over areas where we frequently shot into the ground (where the targets were). I have no idea how deeply embedded into the ground the bullet slugs are, but I can't help feel concerned that the chickens might somehow find them and eat them. Should I be concerned?? Thanks in advance!