I watched my healthy young cat's health deteriorate before my eyes after getting his first (and only) rabies vaccine. He never fully recovered and had chronic, serious health issues thereafter. A holistic vet I later worked with said he and many other old-time veterinarians had observed a serious decline in animals' health (auto-immune diseases, cancers, aggression) following vaccination. He further stated that vaccines are the "bread and butter" of vets and the resulting auto-immune diseases they can't cure, only supress through steroids. Sickening.