I have learned about how I need to be feeding my goats properly from you guys and also have learned about doing my own fecals. Now I need a little direction to make sure I am going to be doing the copper bolus right. I have noticed that the black part of my black/white goats have a burgundy tint on their flanks. My other colored goats' hair is wirey especially along their backs - looks like it has been burned with a curling iron. Do I have to do blood tests to be sure of a copper deficiency or can I just go by the appearance of their coats? They are on Right Now Onyx minerals free choice but I know we have a lot of iron and sulfur in our water and soil so I'm thinking that is messing up the copper being able to be utilized in the mineral. Let me know if that thinking is not right. I have Nigerians who on average weigh 65-75 lbs so 3 grams (1 gram per 22 lbs) would treat 66 lbs. I believe. If I don't blood test should I treat with less copper the first time to make sure I don't do too much or is it like the wormer where youdon't want to underdose? Thanks as always for your input.