My question is how important one of the top of the line mineral programs are..? Not just yes or no please. I'm referring to an all season program from the likes of purina or adm. I'm always suspicious of salesman. This is not just blocks, but bags etc. seems very expensive and I'm curious if it truly does pay? For our 200 head cow herd, that's more than 20k per year. Will I truly see the return? Maybe some testimonials? Sorry for rambling!