The Gentle Leader headcollar is a great training tool! This headcollar consist of a nose loop and a neck strap. The nose loop wraps the dog's muzzle gently but firmly, signaling the dog that you are his leader. The neck straps puts pressure on the back of the neck, making the dog to lean back against the pressure and consequently preventing pulling.
I used this collar with Seamus and noticed an amazing effect while walking him and during dog training sessions. He felt more calm and he did not pull while walking.
The manufacturer recommends to wear this collar as early as 8-10 weeks of age. This collar is great to prevent jumping, pulling and even barking!
It is important to properly fit the collar to prevent resistant and other problems.