Start healthy if you can. Many animals with an unhealthy past can become healthy, it just takes more work. Animals are very sensitive to our stress and tension. In general, try to make your own recipes rather than using a cooked and processed commercial food. When exercising outdoors it is obviously important to protect pets from automobiles, vicious animals and other hazards.
Humans can get boring sometimes.
The closer animals are to a functional form, the healthier they will be. Animals that have been taking long-term medications usually have secondary conditions from the drugs that may be harder to reverse than the original condition. By developing a close relationship with a holistic veterinarian one can learn more specifics about what can and should be done at home. If there are no holistic vets near where you live there are numerous reference materials which will help you decide what needs to be done. A pet raised in a holistic home environment will rarely need to go to the veterinarian.