Will Falconer, DVM Moderator
Arrggh. You neighbor's dog's brain became inflamed, evidenced by all the agitation and aggression. While all vaccines can do this to some extent, rabies, being a brain/nerve virus, does it to a high degree. So, imagine the energetic disease of rabies has just been engrafted onto this little dog's vital force, and you see a version of rabies like this. Biting, suspicion, agitation, irritability. No test would show a rabies virus present, but he got a big energetic dose of rabies, and died as a rabid dog would: euthanasia.
Truly sad. Man made disease, man made death to "fix" it. Tragedy indeed.