A dairy farm in Scotland runs the HerdLine Discharge Line Kit on its milk discharge line. When the buyer's results suddenly dropped, the farm had its own record of every litre — and used it.
The situation
Like every dairy farm, it is paid on fat and protein from the buyer's tank samples. Since 28 January 2026 HerdLine has measured the composition of the milk going to the tank every day.
What the data showed
From late January to early April the buyer's results followed the HerdLine figures closely. Then, in April 2026, two results came back far below normal:
Over the same days HerdLine, measuring every litre of the same milk, showed a steady 4.2–4.4 % fat and 3.5 % protein. Nothing on the farm had changed.
Fat / protein, %. HerdLine on the discharge line from 28 January 2026; buyer's results as received by the farm.
The result
With a documented, independent record of its own milk, the farm challenged the composition it had been paid on. The milk buyer made a €14,000 backpayment — more than the cost of the analyser.
Why it matters for dealers
The proposition is simple: know what you are paid for. HerdLine readings are management data, not the legal payment figure — but they make differences visible, and documented.