Natures Menu compiled a "Top 10" list of ingredients that the company advises all dogs should eat.

Topping the list was tripe, for its dental benefits as well as enzymes, and omega-3 and 6 fatty acids. Parsley was listed as a good source of antioxidants, chlorophyll and vitamins A, C and K. Brown rice is often found in dog food because it is rich in fiber and aids in digestion. The company said carrots are one of the richest sources of beta carotene and apples are rich in vitamin C.

Also on the list were blueberries and swede, which contains the same cancer protecting phytochemicals as cabbage and broccoli. For healthy skin and coat, salmon oil was listed as a source of both amino acids and omega fatty acids that help control inflammation. Other ingredients included chicken, as a source of lean protein, and potatoes, as a high-potassium, alternative carbohydrate.