Chicken is a nutritious option containing a high amount of proteins which ensures the healthy functioning of the body systems of the dog. 
Fish plays a key part as a base food for healthy and nutritious diets for dogs. Fish is not only an excellent source of protein but it is also low in fat, enriched with omega oils, and rich in vitamins and minerals. 
Beef is usually one of the more affordable meats and is relatively healthy for dogs being high in protein, iron, zinc, selenium and vitamins B12, B3 and B6.