Medicated nutritional additives for animal foodstuffs; preparations for use as additives to animal foodstuffs (minerals); preparations for use as additives to animal foodstuffs (trace elements); preparations for use as additives to animal foodstuffs (vitamins); preparations for use as nutritional supplements for animal foodstuffs (minerals); preparations for use as nutritional supplements for animal foodstuffs (trace elements); preparations for use as nutritional supplements for animal foodstuffs (vitamins)