Electric on the outside of your run and coop is the cheapest option. You can usually find used stuff on craigslist. One wire about 12 inches off the ground should do it. If it were me I would try to trap them and I would take them off to the pound. If the owners were to retrieve them then I would trap them again and take them to the next city. Killing them sounds good and would be an option if you were not in a city.
You can't control predators and you can't go killing everything that comes on your property. It is your responsibility to make sure your animals have a safe place to live.
You can't control predators and you can't go killing everything that comes on your property. It is your responsibility to make sure your animals have a safe place to live.