The cheapest tool on your farm is a milk record

Ask most farmers how much milk their best cow gave yesterday and you will get a confident answer. Ask about the cow in the middle of the herd and it gets vague. That middle of the herd is exactly where money quietly leaks away — and a per-cow daily record is the cheapest way to see it.

A drop in milk is an early symptom

Cows go off feed before they look sick. Mastitis, a sore foot, a fever, the early days of a difficult pregnancy — almost all of them show up first as a quiet dip in yield, often a day or two before you would spot anything by eye. If you know each cow's normal, a 15 to 20 percent drop is a flag to go and check her. If you only know the bulk tank total, that same cow disappears into the average until she is visibly ill and far more expensive to treat.

It also settles arguments

Records turn opinions into numbers. Which cows actually earn their feed? Is the new ration paying off, or just costing more? Should this cow stay in the herd another season? You cannot answer any of those honestly from memory — but a few weeks of simple daily figures answer all of them.

The barrier was never the value of the record; it was the hassle of writing it. That is the part we set out to make painless — log a cow's milk in a few taps from the parlour, and let the trend, the herd average, and the "this cow is slipping" alerts build themselves.