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Calving flips a switch in a cow’s body. One moment she’s dry, the next she’s cranking out milk — and that sudden demand hits hard. Calcium requirements shoot through the roof, her energy needs outpace intake, and she loses gallons of fluid during delivery. Put all of that together and you’ve got the perfect setup for two common headaches: milk fever and ketosis.

The kicker? These problems don’t just show up in obvious “down cow” cases. Subclinical forms quietly chip away at performance, reproduction, and immunity, often setting cows up for a tough lactation or early culling. Even if you don’t see the signs, the financial drag is real.