I have a vole colony starting in my backyard. My neighbors have had them for a while- torn up lawn with tunnels and have failed to address it quickly and effectively. I believe some have migrated over and I'm seeing signs of burrowing in my yard. Before they destroy my lawn and plants and get out of control, I am not sure how to address this with backyard ducks. My ducks free range during the day. I don't have a large yard. I can't use poison or traps without my ducks being at risk. Anyone have experience killing voles with other techniques that won't harm my ducks?