One Thursday afternoon in September, I was called out to see a cow in distress. She was down in the yard, groaning, and severely bloated—so much so that I feared she might die from bloat right in front of me.
My first priority was to relieve the gas pressure in her rumen. After confirming it was free gas with a needle (a continuous hiss confirmed this), I administered a local anaesthetic and inserted a red plastic trocar. The gas released quickly, but the cow still looked unwell.
I began a full clinical exam. She was due to calve in about five days, and my checks confirmed the calf was still alive. Suspecting a possible blockage, I passed a stomach tube, which went down easily—ruling out an obstruction. However, the cow reacted poorly, groaning and rolling, which added to the puzzle.
As I stood back and reassessed, her symptoms—bloat, weakness, and depression—pointed to hypocalcaemia (milk fever). It was unusual to see such extreme bloat with milk fever, especially in a cow that hadn’t calved yet. Still, I decided to administer intravenous calcium.
The response was almost immediate. Her condition improved visibly during the infusion, and she was up and walking not long after I left. A few days later, she calved a healthy calf.
Thanks to Cow Manager wearables on this farm, we could review her activity data. The day before the incident, she hadn’t eaten or moved much—clear signs of early illness. This lack of intake during the critical transition period likely triggered the milk fever, even before calving.
This case was one of the most unusual presentations of milk fever I’ve seen—but with quick action and the right diagnosis, it had a successful outcome.
