I have a neighbor farmer that told me he has loose mineral in his barn (about 20 bags). The mineral is probably 10-12 years old. My question is...is it still good? Its been kept in a barn so kept dry just didn't know if over time it might lose its quality.
Vitamins tend to be very labile and degrade quickly. My formulator friends say the shelf life is 90-120 days on vitamins and minerals, although I doubt most producers feed out that quickly. I would think 10-12 years makes the mineral pretty worthless.