I agree with the others that he needs to be seen
immediately. Not wanting to assume but are you saying that you think that mating caused him this all to begin? I really don't think that would be the case and something more is going on with him like the other suggested. Neurological issues can also cause problems with the regulation of life functions like blood pressure, respiration and temperature regulation. Do NOT try to breed him. Whatever is going on with him could be hereditary and be passed on to his offspring.
