Here's what you should do:
* Contact local authorities: Report the attack to animal control or the police immediately. They will investigate the situation and take appropriate action.
* Secure your animals: If possible, secure your farm animals in a safe and protected area to prevent further attacks.
* Install protective measures: Consider fencing, livestock guard dogs, or other measures to deter future attacks.
* Document the attack: Take photos or videos of the dog, any injuries to your livestock, and any damage to your property. This will help authorities investigate and potentially identify the dog's owner.
Remember, killing an animal is a serious offense and could have severe consequences. Always prioritize humane and legal solutions to protect your livestock.