You do not want your life artificially prolonged if there is no reasonable hope of recovery. A health care power of attorney is a document in which you name a health care agent to make your medical decisions if you are not able to do so. My neighbor's pet pig is allowed to roam free and often comes onto my property. It is a felony to kill or steal another's livestock for the purpose of converting it to your own use. However, it is a misdemeanor to allow your livestock to run at large in North Carolina, so your neighbor is in violation of the law by allowing the pig, pet or otherwise, to run free.
Any person has the right to impound livestock running at large or straying.
The impounder must give notice to the owner, and the owner must pay the impounder the cost of impounding and maintaining the livestock, as well as damages caused by the straying livestock. If the owner does not claim the livestock within a stated period of time, the impounder may sell the livestock at a public auction. There is a procedure for doing all of this, so consult a local lawyer before taking action. Also, check with your local health department and your local sheriff. You must be at least 18 years old.