So I was inside and I had opened the door to my chicken coop to let my chickens free range for a couple of hours. I had brought my own dog inside the house as I don't fully trust him with my chickens. Well we live out in the country and I didn't expect a neighbour dog to come over. One of our neighbours was walking their dog and long story short the dog must have seen them from the nearby trail and came over and killed two of my chickens. One was a bantam road island red and one was a marraduna basque chicken. My question is will this dog keep coming back to my house? I probably won't be letting my chickens free range without supervision again but if I make a good run what type of lengths will this dog go through to get my chickens?