My dad and I built my piggies an outdoor cage, my dog decided it would be fun to scare my piggies by hiding behind the cage and then when they don't expect it, pounce and bark near them while they are nibbling on the grass. My piggies are so smart though because they can smell and hear him coming and when he does it they do not flinch one bit but they walk right up, look him in the eye and stay there until he walks away. My dog doesn't do it anymore. My piggies are so brave and smart!