The easiest way to kill the is to set up a gut pile for a month. Just keep piling up dead [Bleeeeep!] in volume in an area that limits their escape routes and allows you to come in undetected. Use night vision or have a partner with a big spot lite . Semi auto .223 with at least a 30 round clip . On the ranch we had a full auto and could whack entire packs. Just what you did back then to protect the calves. The operation down the road had 10k sheep and used to fill a pick up bed from their snare line in the spring. I want to doctor the sow but she is still nursing it appears.