Im building my chicken run and my future flocks safety and my dogs safety are #1. I have retired racing greyhounds so a chicken is like a lure to them. I'm fortifing my chicken run from all sides to make sure no one can get in or out ( Its been a two year build). we are at the stage of installing an electric wire completely around the lower and upper part (racoons and squirls). I'm hopping my dogs will lose interest after a few months. (we got an chinchilla and they lost interest of her after a while) ... but this is always in the back of my mind.