The premix contained the following components per kg of concentrate: Vitamin A 1250 KIU, vitamin D3 270 KIU, vitamin E 5 KIU, manganese 3060 mg, zinc 14,280 mg, iron 3170 mg, copper 3040 mg, selenium 100 mg, iodine 180 mg, cobalt 40 mg. b NEmf was a calculated value, while other values were measured.