Wyo. Stat. § 11-31-105: Killing sheep or other domestic animals; liability of owner.

The owner of any dog is liable for all damages that accrue to any person, firm or corporation by reason of the dog killing, wounding, worrying or chasing any sheep or other domestic animals belonging to the person, firm or corporation. If two (2) or more dogs owned by different persons kill, wound, chase or worry any sheep or other domestic animals, the persons are jointly and severally liable for all damage done by the dogs. Any person who harbors about his premises a dog for twenty (20) days shall be taken and held as the owner and is liable for all damages that the dog commits.