Description sCharacteristics: 22% All-Natural Protein with MOS tub for calving. #17 includes Vitalix Proprietary Enzyme Package. Special order. Use: Use 21 days pre-calving and 60 days post calving to boost health of cow and calfFeeding Recommendations: 3/4 to 1 1/2 lbs per 1000-lb of body weight. Guide: One 250-lb tub for every 20-25 head of cattle.