How many and what types of newborn calf problems do y'all think are caused by not keeping mineral out in the 3-4 months prior to calving season? I'm guessing muscle, tendon, and brain development issues are related to lack of minerals but it's hard to say for sure. Mineral gets very expensive and keeping it out year round is hard to do. I'd guess it's #3 on the expense sheet. #1 Feed, #2 vaccines and antibiotics, #3 mineral.