They are a good cataract prevention. This is often called the fertility vitamin, and is good for both dogs and bitches. It is beneficial for the immune system, and helps with autoimmune problems. It is also helpful for blood circulation. Lack of it can cause testicular degeneration in dogs.
Vitamin E is found in the fats of vegetables, dark leafy green vegetables and nuts.
It is best given by supplements, found in gel caps. Minerals Magnesium A deficiency of this mineral can cause premature birth, and inter-uterine growth retardation. It can also cause over-extension of the carpal joints. Magnesium is found in dairy products, meat, fish and seafood. Zinc Lack of this mineral can cause miscarriage and birth defects.