For many pet owners, it might be a challenge to contain a high energy dog in the yard. The dog is naturally inquisitive, often distracted and will tend to chase anything that takes his fancy. And that is why it is always amusing to see the dog realize an imaginary fence. Inna's case of the Galileo is a good illustration of how a boundary system works if you have the necessary technology and proper training techniques. The dog responding to the Halo Collar boundary cue for the
