My pit-bull mix is one year old. "Nundo" will just take off like a bat out of hell with out looking back. Now I live outside of town on a couple acres, surrounded by farms and some wood plots. I have a Chocolat lab that never has been leashed and has not wandered until Nundo arrived. Tonight the police and local dog warden had the two of them in custody at a concert in the park a couple miles down the road. I dont know if I was more upset or embarrassed. Anyhow, Nundo has not been neutered as of yet. Will this stop his urge to take off like this ? He has the basic training, stop,sit, stay, come, etc. Until he decides its time to run. He's a good dog with the kids, and is a companion for the lab, so I dont to give up on him just yet. I have considered shock collar training.