Nothing is more essential to good training than good health. And the foundation of good health is a good diet. The best ingredient is fresh meat, but it depends on your income whether you can afford it or not. Whatever you do, please do invest in a good dry food product. A good brand is not necessarily an expensive brand. From the label you can learn quite a lot...
When one of my dogs started to have health problems at the age of six, I got pretty serious about dog health issues. I don't watch TV much anymore, if I have any free time I'm usually doing research to try and improve and extend the lives of my dogs.
With concerns about the nutritional value of the contents of commercial dog food, some dog owners opt to make their own dog food. Manufactured dog foods advertised as using natural dog food recipes are becoming common. Dog owners have more options for choosing the best dog food for their dogs.