In March, most cattle producers are thinking about spring grass, dealing with muddy gates, and cutting back on winter feeding. Mineral programs often get overlooked. But this is when late-winter mineral deficiencies tend to show up in beef cattle.The signs are usually subtle, not dramatic. You won’t find a disaster in the pasture. Instead, you might notice a cow not cycling on time, a calf lacking its usual shine, or a group that just seems a bit off. Nothing clearly points to a mineral problem, but something isn’t right.
And most of the time, the issue didn’t begin in March.
The problem often begins in December or January, when cows start depending more on stored forage. As winter goes on, they use up their internal reserves, especially for nutrients like copper, phosphorus, and vitamin A. By March, these reserves are low, and performance can drop.
Late-winter mineral gaps show up now because the cows’ reserves are nearly gone. Reproduction, immune function, and calf growth are usually affected first. This is why managing minerals in March is more important than many producers think.
Here’s what you should know as we move into spring: (1) why late-winter mineral issues happen, (2) the early warning signs to watch for, and (3) immediate steps you can take to protect herd intake, reproduction, and performance.
Creep feeding allows calves to access feed that mature cows cannot. This practice can promote superior calf growth and raise weaning weights, meaning the calf’s weight when separated from its mother. Elevated weaning weights typically result in higher sale prices at year’s end. Providing calves with a digestible supplement supports growth even if forage quality or milk yield declines. Still, creep feeding is not a universal fix. Like any cow-calf management decision, it is most effective when applied strategically for clear objectives.
When it comes to cattle supplements, most producers have a classic love/hate relationship with them. You know they can boost performance, improve body condition, and keep cows productive through tough forage seasons… but you also feel that sting when you look at the price tag. It’s the reason many ranchers wait until the last minute—or until cows start dropping condition—to bring supplements into the mix.
If you’ve ever been out checking cows in late fall and thought, “Maybe I should start feeding them a little,” you’re not alone. Every year, as the grass starts to fade and mornings get crisp, ranchers across the country ask themselves that same question.
Formulating a ration for cattle is critical to any successful beef operation. There are times when forages alone will not supply what the cows need for their stage. When it comes that time, you will need to provide a supplement 
