Variety is important, but raw chicken make up the bulk of what I feed my dogs.
High in Protein chicken is, and although I understand a dog needs more than just a decent % of protein to be a healthy dog, a high protein diet is essential for a working dog.
Lamb (Necks and Ribs), Beef (mince and heart), Rabbit, Venison, Liver, as well as the Chicken.
Not to mention how the dogs love it compared to dry food as well. Cod liver oil everyday mixed in with the food does them well (2.5 ml).