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What would be an acceptable percentage of cows with milk fat to milk protein ratios of 1 to 1 or less?

Last Updated: August 20, 2007

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One definition of milk protein to fat inversion (using crude protein, not true protein) is when fat test is 0.4 point lower than milk crude protein (i.e., 2.8% fat and 3.2% protein). If over 15 percent of the cows are inverted, there may be a problem, i.e. acidosis, using this definition. Many high-producing cows will be lower in fat than protein by 0.1 to 0.2 point due to nutrient shortages and demands.

Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET

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