Vitamins Our knowledge of vitamin requirements of deer is also pretty sketchy. Fat-soluble vitamins are stored in the body, and can in some cases become toxic. Water-soluble vitamins are not stored and are needed by most animals on a daily basis. Ruminants also have no need for vitamin C. Vitamin A is converted from a compound in plants called carotene. Deficiencies of vitamin A have been reported in deer.
Deficiencies can lead to blindness and poor reproduction.
A requirements of deer. There has been some work done on vitamin D. Circulating levels of vitamin D in the blood vary with the antler growth cycle in bucks. That makes sense because vitamin D is needed for calcium absorption and metabolism in all animals. We do not know the requirements for vitamin D in deer, and there have not been reports of vitamin D deficiency symptoms in deer. Energy Energy is not really a nutrient.