Nobody loses sleep over a few extra kilograms of meal in one load. They should. Concentrate mixing accuracy is one of the most overlooked costs in the feed shed. A mineral premix that isn’t spread evenly, or meal loaded a bit heavy, costs almost nothing on one day. Over a season and across a herd, it’s real money and real performance gone.
Why concentrate mixing accuracy matters
Concentrates and minerals cost the most per kilogram and go in at the smallest amounts. That’s exactly why they’re the easiest to get wrong. If a ration calls for 2 kg of meal per cow and the feeder loads 2.3 kg, that’s a 15% overfeed on the priciest part of the ration.
How Small Errors Add Up
Take a 100-cow herd fed 6 kg of concentrate per head per day. A 5% loading error is 30 kg a day. That’s nearly 11 tonnes over a year. At typical meal prices that’s real money, and that’s before you count any effect on milk or condition. In small herds the error is often bigger, because the meal gets measured in buckets or bags instead of weighed.
Underfeeding hurts just as much. Production drops, condition slips and fertility suffers, and usually nobody connects it back to the feed shed.
Concentrate Mixing Accuracy Starts on the Scale
The most reliable fix is weighing small ingredients on their own, not as part of a big load where the scale can’t read them accurately. A bench scale or a dedicated hopper scale for minerals and additives is cheap next to what the errors cost you. On the mixer, load concentrates to a weighed target. Stop counting scoops. Accurate scale systems on TMR mixers make this part of the routine.
Premix the Minerals First
Minerals and additives at really low inclusion rates are hard to spread evenly through a big batch. Premix them with a carrier first, like a portion of meal or another fine ingredient, then add that to the main mix. Distribution gets a lot better. Some farms blend their own concentrate on site. That gives you control over formula and cost, but it demands accurate blending.
If you’re blending meal, grain and minerals on farm, a dedicated concentrate mixer helps you get the same blend batch after batch. Our article on why proper blending changes what hits the bunk explains where a purpose-built concentrate mixer fits.
Check Actual Against Formulated Every Month
A ration on paper is just a plan. Once a month, compare what was formulated with what actually got used:
- Total concentrate bought or blended against planned use.
- Per-head intake by group.
- Mineral and additive stock used against what you expected.
Numbers don’t match? Find out why. Usually it’s loading habits, scale calibration, spillage or herd numbers that changed without the ration changing with them.
Calibrate the Scale
Even good scales drift. Check calibration with known weights at least every few months, and after any repair or hard knock. A scale reading 3% low means every weighed load is 3% heavy. Every day.
Checklist for Small Herds
- Weigh concentrates to target. No more counting scoops.
- Weigh minerals separately and premix with a carrier.
- Calibrate scales on a schedule.
- Check actual against formulated monthly.
- Train every feeder on the same procedure.
It Comes Down to the Feeder
Accuracy depends on people as much as equipment. A feeder in a hurry rounds up, skips weighing the small stuff or eyeballs it. So make accuracy easy. Make weighing quick, keep the scale visible and clean, store small ingredients right by the scale, and tell feeders how close they came to target. Giving credit for good accuracy matters as much as catching mistakes.
Store It Right
Concentrates and minerals lose value fast in a bad store. Damp meal moulds, minerals cake, and rats and birds take more than most farms realise. Keep bags off the floor, keep bins covered, rotate stock and clean up spills. Every kilogram lost in the store is a kilogram you paid for and never fed.
Tie It to Performance
When accuracy improves, you see it in milk records, condition scores and feed cost per unit of output. Track those numbers before and after you tighten up weighing, and show the results to the team. Nothing keeps a new routine going like proof that it’s working.
Final Truth
When margins are thin, getting the expensive ingredients right decides whether the ration pays. Small errors on meal and minerals add up quietly over a season. Weighing, premixing and a monthly check are cheap ways to stop the leak. Blending on farm? The LEO product range has options worth comparing.
Frequently asked questions
Is a bench scale accurate enough for minerals?
A good bench or platform scale with appropriate resolution is usually far more accurate for small quantities than a large mixer scale. Check it with a known weight before each session.
How often should mixer scales be calibrated?
At least every few months, and after any repair, impact or electrical work. Use known test weights and record results so drift can be tracked over time.
Is blending on farm cheaper than buying pellets?
It can be, depending on ingredient prices, volume and labour. Blending gives control over formulation but requires accurate weighing and mixing. Compare total cost, including time and shrink, not just ingredient prices.
Who should do the monthly audit?
Ideally the manager, with input from the nutritionist. The feeder should see the results so problems can be fixed at the source.
