I bought 18 bred heifers last year, they all calved. Calves are 5-7 months old, gave all covexin 8 at 2-3 months of age. Plan on giving them another round of covexin 8 plus worming and IBR. I'm not sure what shots the previous owner gave the heifers. My question is will cattlemaster gold fp5 okay to give to calves? They are still nursing and cows should be 1-3 months bred? Can it cause them to abort?