Over-vaccinating combined with stress, poor nutrition, and other factors is putting our companion animals at risk for serious diseases including auto-immune disorders, cancer or even death. In this well researched book, you will discover how typical vaccination protocols and environmental and genetic factors may be combining to turn your dog, cat, or horse into a ticking time-bomb of health problems, and how you can improve your pet's health and longevity. Bringing together research from around the world, Shock to the System explains the physiology of stress, the role of genetics and nutrition and the health risks to our companion animals from over-vaccination. It also suggests sound solutions to keeping your pet healthy.