Hi, I have a jack russell dog that I love so much. The problem is he needs to go to the vet. Hr eas neutered a few years ago, and now spases out completely and gets very aggressive- most refuse to see him- even with a cruel muzzle on- I don't know what to do- is there a doggie valium I could give him first- he needs his heartworm and other shots- the whole thing is so traumatic- help!sincerely, tjbfluffy