One in four dogs develops cancer and approximately 50% of dogs over ten years old die from cancer. A dog with a healthy immune system is the least likely to get the disease. Dogs and cats need antioxidants as much as-if not more than- people do. They are exposed to chemicals more intensively than most humans because they are shorter and breathe in greater concentrations of floor and lawn chemicals. Don't forget about the chemically treated flea collars and unhealthy snacks they often pick up in the park or on the street. Vitamins C, E, and
A along with beta-carotene and selenium are a few of the antioxidants that should be included in their diet.