What to watch for

Standing heat — when a cow holds still to be mounted by herdmates — is the clearest signal, but it lasts only a few hours and often happens at night. The supporting signs are what give you a wider window:

• Mounting other cows, or standing to be mounted
• Clear, stringy mucus discharge from the vulva
• Restlessness, bawling, and pacing the fence line
• A sudden, unexplained drop in milk that day
• Swelling or reddening of the vulva
• Mud or rub marks on the hips and tail head from being mounted

Two cheap habits that catch most of them

First, watch at the right time. Most standing activity happens in the early morning and late evening when it is cool, not in the heat of the day when you are usually out among the animals. Ten focused minutes at dawn and dusk beats an hour at noon.

Second, write it down the moment you see something — even an "I think she might be coming on" note. A heat you log today tells you when to look hard again in roughly 18 to 24 days if she does not get served. That pattern is impossible to hold in your head across a whole herd, but trivial once it is written down.

That is the whole idea behind logging in Herd Signals: the app does the counting, so a maybe-heat today becomes a reminder to check her again at the right time — and a cow who should have cycled but has gone quiet gets flagged before she costs you a season.

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.

1. Feeding the whole herd like the top cows

A cow giving 5 litres does not need the same ration as one giving 25. When everyone eats the high-production mix, you are pouring expensive concentrate into animals that cannot turn it into milk. Grouping by production stage — even loosely — is one of the fastest ways to cut cost without cutting yield.

2. Guessing at quantities

Eyeballing scoops drifts upward over time, and a little extra per cow per day multiplied across the herd across the month is a serious number. Mixing to an actual target for the actual number of animals in each group keeps that drift in check — and tells you honestly when stock is running low instead of surprising you.

3. Buying without records

If you do not track what feed costs you against what milk it produces, you cannot tell a good buy from a bad one. The supplier who is "a bit cheaper" might give you less milk per kilo and cost more per litre sold. You only see that when the feed and the milk sit in the same place.

None of this needs a nutritionist on speed dial. It needs your feed, your herd counts, and your milk in one view so the waste becomes obvious — which is exactly what the feed and production tools in Herd Signals are for.