They are…. But they have a super high drive…. Just yesterday I was walking the Dude and a Belgian ran directly through a wooden slat privacy fence to go after my dog….boards went flying, Belgian got cut on the fence….. but once it got close to Dude, he let out a big dog bark and stood his ground, and the Belgian took off the opposite direction…. I think if you aren’t prepared to keep those dogs super active and occupied, they are a problem…