Here’s how it goes on a lot of farms. The milking cows get fed first, and the heifers get whatever’s left in the tub. A heifer TMR ration in summer deserves better than leftovers. These are your future herd, and in hot weather that shortcut costs more than you’d think.
Why the heifer TMR ration matters more in heat
Heat pushes intake down and feed goes off faster in the trough. A heifer that stalls in her first summer often calves later or lighter. Then you get sorting, refusals and a group that’s all over the place on size.
Smaller, Fresher Batches, More Often
With young stock, freshness is half the battle. A big batch mixed once a day can be heating by afternoon, especially with wet silage in it. What works better in summer:
- Mix twice a day, or mix once and hold half back for the cool evening.
- Size batches so the trough is nearly clean before the next feed.
- Clean out refusals every day. Heating leftovers spoil the fresh load.
Here’s the catch. Most mixers are sized for the cow herd. Mix a small batch in a big tub and you often get a lousy mix, because the auger needs a minimum fill to move material properly.
Get Particle Size Right in the Heifer TMR Ration
Young stock need effective fibre, but they’re experts at sorting out long stems and picking the concentrate. Chop roughage to a consistent length and mix it evenly through the ration and you cut that down. Check what’s left in the trough. If refusals are mostly long hay, the chop length or the mix is off.
In the heat, don’t let the ration get too dry either. A bit of moisture helps it hold together, but too much speeds up heating. Find the balance and check the trough an hour after feeding.
Water and Shade Come First
No ration fixes a heifer group that’s short on water or shade. Make sure the troughs can handle the whole group drinking after feeding, and put the feed where they can eat in the shade during the hottest hours. Feeding late afternoon or evening moves intake into the cooler part of the day.
When the Tractor Bucket Stops Cutting It
A lot of farms start out feeding heifers with the loader bucket. Some silage, a bag of meal, a scoop of hay. It works for a handful of animals. Then the group grows and the problems show up: inconsistent amounts, poor mixing, sorting and time lost every single day.
Signs it’s time to move on:
- Heifer groups of 30-50 head or more fed daily.
- Obvious sorting and uneven condition across the group.
- It takes more than one person to get the young stock fed.
- Growth targets slipping every summer.
That’s when a lot of operations add a small mixer just for young stock. A mini vertical mixer is built for small batches, so heifer rations get mixed fresh without running the main mixer half-empty. Our earlier piece on KZN heifer yards that outgrew the tractor bucket walks through that decision in more detail.
Summer Checklist for Young Stock
- Feed twice a day, or move feeding to the cool part of the day.
- Size batches to the group and clean out refusals daily.
- Check chop length and sorting at the trough.
- Have enough water and shade near the feed.
- Weigh heifers monthly so you know they’re on target.
Match Ration Changes to the Season
Summer is also when forage quality tends to move around. New-season silage, lucerne cuts that vary, or bought-in roughage can all change the energy and fibre a heifer gets. Bring changes in over several days, not overnight, and watch dung, intake and how they act at the trough. Young stock react faster than mature cows to sudden changes.
Labour and Routine
A heifer routine that depends on one guy rarely survives a busy season. Write down batch sizes, ingredient amounts and feeding times so anybody on the team can deliver the same ration. If you’ve got a dedicated mixer, a laminated sheet at the loader with the young-stock recipe keeps batches the same day to day, even when the regular feeder is off.
Track the Results
Record weights or girth measurements against age and compare them to your target growth curve. Groups that fall behind in summer show up early, and you can fix their ration, water and shade before the shortfall becomes permanent.
Final Truth
Heifers that keep growing through summer calve on time and milk better. Small, fresh batches mixed the same way every day are the simplest way to get there. Still feeding young stock from a bucket? This is a good summer to change that. Your local LEO dealer can help size a mixer for the group.
Frequently asked questions
How small can a batch be in a large mixer?
It depends on the mixer, but most vertical mixers need a minimum fill for the auger to lift and turn material properly. Below that, mixing quality drops. Check the manufacturer’s guidance and look at the mix in the trough. If small batches are routine, a smaller mixer is usually the better option.
Should heifers get the same ration as cows?
Usually not. Young stock have different energy, protein and fibre needs. Some farms feed a diluted version of the cow ration; others formulate separately. Ask your nutritionist which approach suits your growth targets.
How often should heifers be weighed?
Monthly weighing or tape measurement gives enough data to spot slipping growth before it becomes a calving problem. Record results by group so ration changes can be linked to performance.
Is evening feeding enough in extreme heat?
Shifting feed to evening helps, but it works best combined with shade, cool water and fresh batches. Watch intake closely during heatwaves and adjust as needed.
