Some of the things the dog must demonstrate in a herding instinct test is first of all that they even see the stock, aren't afraid of them and then if they maintain a focus on the sheep or cattle or goats, whatever they're using. Tex is showing all of those things as well as moving back and forth along the fence. You can go to the AKC website and search for herding instinct tests in your area if you want to give it a try, or locate a trainer and see what they think. Herding is really fun!!