Should you give grass fed cows mineral blocks and salt licks all year long?

This is a very important thing to do, yes, because the grass they eat doesn't have all the necessary minerals they need: they need to get it in either loose or block form. Ideally, summer time is best for blocks, and winter for loose, but you can feed loose and/or block all year round, your choice. Just note that mineral blocks have 95% salt in them, not nearly as much mineral as the loose form would have.

草饲牛全年提供矿物质块和盐舔是合理的，因为它们有助于补充牛所需的各种矿物质和盐分，尤其是在自然草场中可能无法获得足够的矿物质的情况下。但是，具体的提供方式和类型应根据牛的营养需求、草场的矿物质含量以及当地的气候等条件来决定。建议咨询兽医或专业的畜牧顾问以获取更加具体的指导。