Nutrition for rabbits

Calcium

 * LafeberVet.com, Calcium Homeostasis in the Rabbit

Vitamin D

 * Bright Eyes Sanctuary, The Truth About Vitamin D: is it the answer to rabbit dental disease?

Vitamin E
Below are some articles with more information about the importance of Vitamin E for your rabbits.
 * Examiner.com, Phyllis O'Beollain, Is your rabbit getting enough Vitamin E?

Protein
Growing rabbits have better health when the ratio of digestible fiber to crude protein is increased over 1.3. Generally, this means digestible fiber should be over 20% and crude protein below 16%.