2-3 eggs a week will do. Shells and all can be crushed and put into the mush meal. Apple cider vinegar is a wonderful product and should be included in all mush meals. About 3 tablespoons per adult dog. Powdered, available from most good pet shops.
Kelp helps keep the dog healthy.
Available from most good pet shops. Not to be confused with cooking yeast, brewers yeast is an excellent source of the B vitamins. 1 teaspoons in mush meal per adult dog. 2 teaspoons of mix per adult dog. Garlic is very good for dogs.