Is it unhealthy for my child to be Vegan?

Germany

A vegan diet is not suitable for infants and young children, as this is a time of rapid growth and development when a good supply of energy and nutrients is particularly important. Parents must be aware of the particular nutritional deficiencies that may occur. A child´s diet should include enough energy to assure healthy growth and development, iron to prevent anaemia, Vitamin B12, Vitamin D and calcium to prevent bone disease as well as sufficient fat and amino acids. Vegetarian diets can lead to vitamin and protein deficiencies, so care must be taken that nutritional needs are met. Therefore we recommend that very young children and babies should not eat a strict vegan diet. Furthermore this is the age when food tastes are learned, so giving your child the chance to explore a variety of tastes and textures is important to future likes and dislikes.

See also:

http://www.dge.de/modules.php?name=News&file=article&sid=24

and
http://www.nutrition.org.uk/home.asp?siteId=43§ionId=394&subSectionId=315&parentSection=299&which=1#1021