All problems in beef cattle are not due to minerals, but it's still important to improve forage quality and to insure cows receive adequate energy and protein to match their nutritional demands during pregnancy, nursing, rebreeding and weaning periods.
Monitor mineral consumption. The very best mineral formula will not work if cattle don't consume it. Mineral consumption varies during the year, but average consumption should be near the level for which the mineral was designed.
Work with mineral dealers. Ask questions. Avoid making hasty decisions. Mineral nutrition is not an easy topic, and you may need a specialized supplement, prepared on a custom basis.
It is possible to have too much of a good thing. Most beef cattle breeds are relatively tolerant of the levels of copper commonly available, but Jersey cattle and sheep are susceptible to copper toxicity. Selenium toxicity is possible, but unlikely due to legal levels allowed in mineral supplements.