I'm getting ready to start predator proofing my duck pen again, I thought I had it well protected before but something ( we think a raccoon ) was able to get to my 2 ducks & kill them so i'm putting up extras this time so nothing can get to my littles ones once I put them in there. I'm putting up hardware cloth & i'm looking into buying the NiteGuard Predator Lights has anybody ever used them do they work?????