Doing a quick calculation to determine herd milk fat and protein ratio could help dairy farmers drill down on feed efficiencies and cow health as we head into the New Year.

Rather than just looking at milk constituent levels in relation to milk pricing, Dr Robin Hawkey from Mole Valley Feed Solutions believes there’s huge value to be had from determining milk fat and protein ratio - something which can typically come under pressure in January/February time.

“Where as milk fat and protein percentages on their own can be influenced by the number of fresh or stale cows in the herd, the ratio of the two provides a reflection of ration balance and type of fermentation,” he says.

A high butterfat to protein ratio could be an indication that energy is lacking in the diet and ketosis may be an issue. In comparison, a low ratio could be a sign of starch fermentation and acidosis. This ratio can be simply calculated by dividing milk fat percent by milk protein percent, with an ideal ratio of around 1.27 (see table).

Commonly, milk protein tends to drop off in January/February, resulting in a high ratio. However, with some farmers tackling low dry matter, greener silages and feeding more, low cost cereals, the balance could shift the other way. As a result, careful monitoring, will be even more important this year.

With farmers typically receiving their milk quality reports every other day on their mobile phones, Dr Hawkey says tracking changes can be a simple exercise. However, when changes occur it’s important to ask why and to continue to monitor milk quality over the following week.

He explains: “It shouldn’t be a knee jerk reaction. Look at trends in the ratio and also look at what the cows are telling you - what’s dung consistency like? are they cudding? what’s cow condition like? You can then speak to your nutritionist to discuss if ration changes need to be made. With continued downward pressure on milk price set to continue into 2016, it’s vital that rations are balanced effectively so cows are performing efficiently.”

For advice on winter rationing, contact your local Mole Valley Feed Solutions nutritionist or call the FeedLine on Tel: 01278 444829.