I know a lot of American hunters use speial feed (in pellet form?) as well as sowing some type of clover to give the deer in their areas supplements to increase antler growth. In Italy they are not up to it yet so it is not availiable. Can anybody tell me what the individual neccassary minerals and vitamins are?

As long as they do not contain any animal by products. If they do do not use them there is data out there that it could be linked to CWD. You sure to not want to get that started in your area.