My two dogs are the total opposite, Zuki is a Chihuahua x and Ralph Is an English Staffy. They where running off all the time and my neighbors where starting to complain. We live on 2.5 acres and the dog line has gone the whole way round our property easily. From the moment I put on there collars and gave them both a quick run down on how crossing the line gives them a shock they haven’t run away since. I honestly thought it would take ages to train them to understand there new boundary but they learnt in one afternoon. I’m really happy with the service I was provided by Dog line, I’m so happy I went ahead and did this.