just make sure you read the directions really good ive givenit to some pretty young calves before but not just 10 days and the bottles in the barnso i can check it
give her a shot of nuflor in the neck under theskin and wait 48 hours and give her a nother that should kcock it out tylosin or batryl works good to but ive always had real good luck with nuflor it had saved me a lot of calves