Quite a few states have a Crop Damage law that allows a farmer/landowner to shoot animals doing crop damage or threatening your livelihood. ( i.e. Trampling down crops.) You'd need to check with your state and local govt law enforcement (a game warden, probably) to get the right information for your area.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them