Other minerals, such as phosperous may contribute to growing disorders such as Wobblers, if supplemented. Some breeders believe that high doses of Vitamin C may prevent the incidence of growing disorders, such as hip displaysia. The dosage is 1000 mg - 2000 mg per day of a Vitamin C salt. As excess Vitamin C is excreted in the urine, it is unlikely that this supplementation can do any harm. Vitamin E is often used as a preservative now, and is considered safer than other chemical preservatives, such as Ethoxyquin.
Vitamin E is though to lead to a healthier coat.
Foods that do not include Vitamin E may be supplemented. Your Dane will be eating less vitamins and minerals, and so supplementation may be recommended to balance the diet. However, calculating the correct supplementation is probably only for the very experienced, as will be explained in section D. D. Calculating Nutrient Levels in Moist Foods. This is one of the areas of the greatest misunderstanding in the dog world. Very few dog owners understand how to calculate the real amounts of nutrients their dogs receive, although for most people it is not important.