If you plan on using commercially produced food to feed your dog, then give some serious consideration to using a high-quality organic dog food. Higher initial costs for the best organic dog food really pays dividends in terms of your pets health, however, it's really not necessary to buy the best.
If you choose to feed your pet a commercial brand, then over time, expect to pay increased veterinary costs and experience more behavioral problems with your dog just so you can save a few pennies here and there.
Whenever you use organic dog food, your dog requires a smaller helping due to the higher nutrient concentration. If you begin with high-quality organic and natural dog food, basically you save yourself a lot of money in the long run, plus you'll have a healthier dog.