I've searched all over, but can't seem to find an answer. Maybe I'm using the wrong search terms. Anyways, at what age should I band my bull calf? My neighbor said around a month old, but my husband's uncle says 4-5 months. They've both done it, so I'm not sure which one to listen to. This little guy is a Brown Swiss (so not so little). I can't imagine waiting until he's 4-5 months.