I have a Jack Russell that behaves bizarrely once he has his head halter put on. He is 10 months old and has done training with his halter, but once it is put on it is almost like he shuts down. He will not move and almost fears having it put on. We have never done anything that could associate the halter with a negative experience and even the training school we went to was puzzled by the behaviour. Are you able to shed some light on what could be the cause? Our other, six-year-old, Jack Russell doesn't like having it put on, but behaves normally once it is on.
provided by Dr Paddy Batch BVSc