Can you find your dog’s ribs easily, or do you have to search for them? If you discover that you are not able to feel its ribs, you have an overweight dog.
Just like people, a healthy diet, combined with exercise, gives a dog physical and mental well-being.
Good nutrition also gives your dog the means to fight off infection and illness.

It is best to feed your dog a diet of premium dog food that contains high quality digestible protein, without meat by-products, indigestible fillers, dyes or chemical preservatives. Even though premium food may cost more, your dog will eat less, be more satisfied and you will be able to see the results in its glossy coat, shiny eyes, smooth skin and alert expression, with your own eyes.
Because both cats and dogs eat only enough to satisfy their nutritional needs they eat less natural cat food, or organic dog food than the cheaper foods with fillers, dyes and preservatives; resulting in approximately the same cost per meal.

Regardless, whatever you choose to feed your pet, always read the food labels to check  the ingredients and be wary of the additives mentioned above.