Dog and Copperhead

We have more cottonmouth that anything other snakes, we just killed one the other day in the yard, one of my dogs has been bitten twice and got over it in a few days but still pursues them when we go in the swamp behind the house, I carry a sawed off 410 that is mounted on my tractor and carry a pistol on my hip when walking in the swamp. We do have rattlers but very few. an having chickens and geese we naturally get oak snakes (no poison) but
have to watch the chicken house as chickens and eggs will disappear.