With farmers facing costly milk contract penalties for below target butterfat levels, supplementing grass with a total mixed ration (TMR) to prioritise rumen health could pay dividends.

This is according to Dr Helen Warren, Alltech European technical manager. She says that typically milk butterfat levels fluctuate the most during spring, but the problem often continues throughout the grazing season as grass quality varies which can cause fluctuations in rumen pH.

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