arousal, excitement
Excited when he sees another Dog
The most shocking thing is that the lady, in her very best efforts to give her Battersea dog a good life, has had three people in to help her with her lovely dog. One gave her a prong collar and the other an electric collar. I’m relieved that she never used the e-collar, but just imagine the prongs of the other collar on a skinny Greyhound neck.
The way to reverse a particular behaviour is to get to the cause of it and deal with that, not to inflict pain or fear.