I was wondering how often you can give BO-SE shots and also how often you can copper bolus (with the max amount). We are deficient in both of these things in my area. I read that you can BO-SE as soon as every 21 days. However, my free-choice minerals has some selenium, Vit. E, and copper sulfate (which I've read is different than copper bolus) in them. I just wanted to make sure I wasn't overdosing by giving them extra combined with what is in the minerals. Thanks!!