Cows crowding around a feed bunk can be a sign of limited feeding space, but the pattern matters. A pen may have enough TMR for the day while younger cows wait behind occupied headlocks. Another group may have plenty of feeding positions but rushes to one end because the ration has been delivered unevenly.
The first job is to find where competition occurs, when it peaks, and which cows repeatedly lose their place. Those observations help distinguish a feeding-space shortage from a problem with feed delivery, cow movement or group management.
For a new dairy barn, the same checks can be used to plan headlock positions, feeding alleys, water access and cow traffic before equipment is installed. This guide focuses on that practical diagnosis and the resulting layout decisions.
1. Identify the Type of Feed Bunk Competition
Spend time at the bunk before changing the ration or ordering more equipment. Watch a normal feeding period, the return from milking, and the quieter hours between deliveries. Where practical, use a fixed camera position so activity at different times can be compared.
| What you observe | First area to inspect | Useful follow-up observation |
|---|---|---|
| Cows crowd the entire feeding line after fresh feed arrives | Feeding-space allowance and peak demand | Count occupied positions and cows waiting behind them |
| One section stays crowded while another has empty positions | Uneven feed delivery, local access and cow traffic | Compare feed depth, reach and crossover locations |
| Feed remains in the bunk, but cows stretch to reach it | Feed push-up schedule and curb geometry | Check the distance from the barrier to the accessible ration |
| First-lactation or smaller cows leave repeatedly | Group composition and physical displacement | Track whether the same cows return later to eat |
| Crowding occurs mainly as cows return from milking | Return routes and feeding schedule | Note when each group reaches its pen and whether feed is ready |
| Competition persists throughout the day | Available positions, stocking pressure and barrier design | Measure the feeding line and count serviceable openings |
Record displacement as well as occupancy
Count a displacement when a cow is pushed or pressured away from a position by another cow. Also note cows waiting, changing positions or leaving without a feeding bout. The repeated pattern is especially useful: the same smaller or recently regrouped animals may be the ones losing access.
Cows rushing toward freshly delivered TMR is expected behavior. A problem is more evident when repeated crowding prevents part of the group from eating normally, even after the first rush has passed. Research published in the Journal of Dairy Science links greater stocking pressure with more displacements and altered feeding behavior, particularly during feeding peaks (study on feed barriers and stocking density).
2. Calculate Usable Feeding Space and Headlock Capacity
Two measurements are needed for a feeding-area assessment:
- Usable feed-bunk length: the continuous feeding edge that cows can actually use, excluding blocked sections, posts, damaged equipment and unusable corners.
- Serviceable headlock openings: the openings suitable for the cattle group, with functioning mechanisms and enough room for comfortable feeding.
For an open feed rail, start with:
Linear feeding space per cow = usable bunk length ÷ cows in the pen
For a headlock line, also calculate:
Cows per headlock opening = cows in the pen ÷ serviceable openings
Feeding-space benchmarks for planning
The 2023 Canadian Dairy Cattle Code of Practice, Section 2.7 recommends at least 60 cm (24 in) of linear bunk space per lactating cow and 76 cm (30 in) per transition cow in freestall and bedded-pack barns. The code also recommends physical feeding barriers and feeding alleys at least 4.3 m (14 ft) wide. These are identified as recommended practices in that Canadian code, and project dimensions must reflect the herd and the applicable local requirements.
For herds experiencing crowding, 75 cm per lactating cow is a useful more generous design scenario. The table shows how these two allowances affect the length of feeding edge to be planned:
| Lactating cows in one or more groups | At 60 cm/cow | At 75 cm/cow |
|---|---|---|
| 100 | 60 m usable bunk | 75 m usable bunk |
| 300 | 180 m usable bunk | 225 m usable bunk |
| 500 | 300 m usable bunk | 375 m usable bunk |
Apply these figures to the actual groups and available feeding edges in the barn layout. Transition and fresh-cow groups deserve particular attention during allocation.
Worked check: 100 cows sharing an 80-place headlock line
Suppose a pen holds 100 cows and has 60 m of usable feeding edge, fitted with 80 functional headlock openings at 75 cm centers.
- Linear bunk allowance: 60 m ÷ 100 cows = 0.60 m/cow.
- Installed headlock availability: 80 openings ÷ 100 cows = 0.80 openings/cow.
- Stocking pressure: 100 cows ÷ 80 openings = 1.25 cows/opening, or 125% of installed headlock capacity.
The bunk length meets the 60 cm/cow linear reference, yet the headlock arrangement provides fewer openings than cows. During a synchronized feeding peak, some animals must wait for a position. A wider 75 cm opening offers more room to an individual cow, while fitting fewer openings along that fixed 60 m line. The project must therefore balance cow comfort, opening count, group size and the available feeding edge.
The University of Wisconsin's Dairyland Initiative feed-bunk design guidance notes that in observed pens with approximately 61 cm headlocks, peak occupancy may be around 80% of installed openings. Peak occupancy is a useful behavioral observation to consider alongside group size, headlock dimensions and feeding schedules during the design review.
3. Inspect Headlock Dimensions, Reach and Safety
Headlocks can give cows defined feeding positions and reduce some sideways interference between neighbors. Their performance depends on the correct opening, mounting height, reach and release mechanism.
For an existing installation, check the following points before replacing the whole line:
| Inspection point | On-site check | Design implication |
|---|---|---|
| Opening centers | Measure the actual center-to-center spacing and count working openings | Determines headlock capacity and shoulder room |
| Neck opening and adjustment | Observe cows entering, lowering their heads and withdrawing; inspect rub marks | Match geometry to body size and equipment specification |
| Mounting height and curb | Inspect the feed curb, lower rail and head position while eating | Affects comfort, reach and pressure on the neck |
| Feed reach | Check where feed lies after delivery and after several feeding hours | May require curb, barrier-angle or push-up changes |
| Locking and release | Test individual action, group release and emergency-release function | Essential for safe cattle handling and maintenance |
| Support structure | Check post spacing, fasteners, alignment and corrosion | Determines installation and retrofit requirements |
Headlock mounting dimensions and feed reach
The University of Wisconsin Dairyland Initiative's feed-bunk design guidance provides several useful starting dimensions for Holstein housing with self-locking headlocks:
| Component | Holstein design reference | Installation check |
|---|---|---|
| Feed curb supporting headlocks | 46–51 cm (18–20 in) high above the cow-side standing alley | Check the as-built curb top against the selected mounting bracket |
| Upper edge of the headlock's lower rail | 53–58 cm (21–23 in) above the cow-side alley | Keep the throat area comfortable through the eating motion |
| Commercial headlock spacing | 61 cm or 76 cm nominal widths are described | Select the spacing for herd size and the planned pen; 76 cm is preferred for close-up and fresh cows |
| Neck pivot gap, closed position | 19–22 cm for larger Holsteins in the cited design guidance | Verify animal size and the headlock supplier's adjustable settings |
| Feed table | A smooth feeding surface about 10–15 cm (4–6 in) above the cow-side standing floor is recommended in the Canadian dairy code | Measure the finished surface, curb and cow-floor elevations separately |
The headlock frame can be tilted toward the feed side to improve reach. Set its inclination using the frame geometry, fixing brackets, herd size and the mounting drawing. Post-and-rail feed barriers use their own curb and rail details.
For feed reach, mark the feeding table at 30, 60 and 90 cm from the inner face of the curb during the initial site survey. The marks provide a consistent survey grid for recording how far feed moves between deliveries and push-ups. Compare the pile just after delivery, during peak eating and after push-up. Look for neck rubbing, prolonged stretching or cows unable to reach the remaining ration. The push-up route and discharge settings can then be adjusted to keep a continuous, comfortably accessible line.
At the quotation stage, record cow-side floor level, feed-table elevation, curb width and height, barrier inclination, and the feeding-table profile on the same cross-section drawing. This is especially useful when retrofitting an older barn.
NexAgri can use the barn's DWG or dimensioned layout and herd information to prepare headlock quantities, module arrangements, opening configurations and installation drawings. Its dairy cow headlock range provides a starting point for the equipment discussion.
4. Find Congestion in Alleys, Crossovers and Watering Areas
A crowded feed bunk may have adequate physical length but poor entry and exit routes. Watch how animals approach the line, pass behind feeding cows and move between waterers, resting stalls and the parlor-return route.
Five layout checks for an existing barn
Cow-side feeding alley: Measure the unobstructed width behind the standing cows. The 2023 Canadian Dairy Cattle Code recommends at least 4.3 m (14 ft) at feed bunks. Include cow body space, passing traffic, posts and the movement of cleaning equipment when inspecting the actual width. This dimension refers to the cattle alley; the separate drive-through feed delivery lane between two feed curbs may require approximately 5.5–6.1 m (18–20 ft) for wagon movement in a two-sided design described by the Dairyland Initiative.
Crossovers: Check the routes from resting stalls to the feed line and waterers. For a crossover containing a water trough, the Dairyland Initiative water-space guidance recommends approximately 3.7 m (12 ft) clear cow-flow width beside the waterer, with the total crossover about 4.3 m (14 ft). Measure the trough projection and the remaining walking clearance separately. Narrower routes may be appropriate for other purposes, depending on the pen and local design guidance.
Water access: Record whether animals queue, turn around or block the adjacent alley at drinking points. Check drinking perimeter, flow rate, cleanliness, water pressure and the routes animals take to reach the trough. A well-placed drinker allows a cow to drink without blocking the entire crossover.
Pen gates and return routes: Watch the flow as a batch returns from milking or a sorting gate opens. A corner with only one accessible route can become crowded even when empty feeding spaces exist farther along the bunk.
Feed delivery and cleaning traffic: Confirm that tractor movement, feed wagons, scraper operation and temporary barriers do not repeatedly close part of the usable feeding edge.
The Canadian code provides an additional reference of 8.9 cm of drinking space per lactating cow in its recommended practices, alongside advice on water flow and access. In an actual retrofit, trough capacity and position should be designed around the pen's cow numbers, water demand and circulation routes rather than an assumed fixed number of waterers per group (code, Section 3.5).
Decide between an adjustment and construction work
Relatively contained changes may include gate re-hanging, barrier repair, relocating movable pen partitions, changing feeding-group allocation and improving feed push-up routes. New concrete feeding edges, major alley widening, altered drain gradients or larger water supply lines require a more extensive design review.
The renovation plan should maintain clear routes between the ration, watering points, resting area and milking return path. Resolve recurrent crossover bottlenecks before adding new feeding positions nearby.
5. Protect Feeding Access During Peak Demand
The highest demand often follows fresh feed delivery or the return from milking. Plan feed availability around fresh-feed delivery and the cow group's return from milking, when demand commonly increases. Feed-bunk management research helps explain why synchronized demand can increase competition in crowded pens.
Coordinate feeding with the actual return pattern
A herringbone or parallel parlor may release cows in batches; a rotary can produce a more continuous outflow. Gates, group size, parlor throughput and walking distance determine what that pattern looks like at the barn. Record the time each group returns rather than assigning one standard feeding schedule to every parlor type.
Before the first animals reach their pen, verify that the feed line is reasonably even and TMR is within reach. Arrange additional push-ups around the observed peaks and the periods when feed begins moving away from the barrier. Keep night-time accessibility and staff changeovers in the same schedule.
Check what the automatic feed pusher actually achieves
An automatic feed pusher is most useful when feed becomes inaccessible between deliveries. During commissioning, test its route with cattle present and feeding equipment operating normally. Check:
- Whether it reaches the full length of the required feeding line, including ends and adjoining sections.
- Whether the ration is brought consistently within comfortable reach without creating large piles or empty gaps.
- Whether charging and scheduled pauses overlap with high-demand periods.
- How it responds to closed gates, feed-wagon traffic, obstructions and emergency stops.
- Whether the route resumes properly following a stop and whether its maintenance points are accessible.
Use the marked feeding-table distances and three fixed observation points to tune each push-up route. Record where the ration sits immediately after the pass, then adjust frequency or offset if cows still struggle to reach it.
6. Separate Uneven Feed Delivery from Insufficient Bunk Space
Local crowding sometimes follows the pattern of the ration rather than the location of headlocks. Walk the line directly after delivery, later in the feeding period and before the next feeding.
At the beginning, middle and end of the bunk, record feed depth, continuous coverage, distance from the barrier and obvious differences in the fresh mix. Repeat the same observations after push-up. Where sorting is suspected, compare representative fresh TMR and refusal samples with the farm's normal particle-size assessment method.
The observations point to different actions:
| Finding | Practical interpretation | Next action |
|---|---|---|
| One end gets a larger or fresher pile at delivery | Delivery or discharge pattern is uneven | Adjust wagon discharge, route and operator practice |
| Feed is initially even but becomes unreachable between deliveries | Push-up interval or route is inadequate | Change push-up timing and verify final feed position |
| Different sections contain visibly different ration components immediately after delivery | Mixing, discharge or ingredient-distribution issue | Review mixer loading, batch size, discharge and representative samples |
| Ration remains evenly accessible but cows queue and repeatedly displace one another | Feeding-space or group-competition pressure | Check usable openings, density, behavior and grouping |
| Only a corner is crowded despite free places elsewhere | Cow-flow, water, gate or local comfort issue | Observe approach routes and the attractiveness of that section |
Feed distribution can be organized around a trailed or self-propelled TMR mixer that unloads directly into the feed lane, or a stationary mixer connected to a dedicated feed-delivery wagon or truck. In either arrangement, delivery speed, discharge-door opening and travel route determine how evenly the ration is placed along the bunk. Check the first, middle and last sections during commissioning and adjust the settings to avoid concentrated piles or empty stretches.
NexAgri supplies mobile and stationary TMR mixer configurations and provides feeding-lane and discharge-layout support. The planned delivery method can be incorporated into the equipment arrangement according to the farm's available vehicles and barn dimensions.
Detailed mixer loading orders, particle-size targets and ration formulation belong in a separate TMR feeding guide. For this diagnosis, the key question is whether the same usable ration reaches every section of the feeding line.
7. Give First-Lactation and Fresh Cows a Fair Chance to Eat
First-lactation cows, newly regrouped animals, fresh cows and cattle recovering from lameness can be especially vulnerable to competition. A farm may have enough nominal bunk length yet still find that these individuals are frequently displaced.
When a pen shows that pattern, check whether a different group allocation would reduce pressure without disrupting the animals unnecessarily. In larger herds, separate first-lactation or fresh-cow groups may help management teams control stocking pressure, observe intake and provide appropriate space. Group arrangements should follow the available pens, cow numbers and established transition-cow plan.
The most valuable checks are individual and observable: which cows wait, which are repeatedly displaced, and whether they return and feed later. Pay particular attention to cows recently introduced to an established group.
A sensible order for a budget-constrained farm is to repair access and delivery problems, adjust grouping where space allows, then plan additional usable feeding capacity for pens with persistent competition. A pen that remains overcrowded after those corrections needs a structural or stocking solution.
8. A Short Feed Bunk Inspection for the Barn Manager
The following log can be completed during a normal feeding round. Observe one period after fresh feed delivery, one after the group's return from milking and one between deliveries. Repeat the same checks after a management change.
| Check | What to record | What the record helps decide |
|---|---|---|
| Demand | Time, group, cows present and number feeding or waiting | Whether the problem follows a peak event |
| Displacement | Location, repeated push-offs and cows leaving | Whether vulnerable cows lose access |
| Feed reach | Accessible feed at the beginning, middle and end | Whether push-up or delivery needs adjustment |
| Feeding places | Usable bunk length, functional headlocks and cows in the pen | Whether installed space matches group demand |
| Cow traffic | Queues and blockages near waterers, gates and crossovers | Whether layout changes are needed |
| Follow-up | One change made, date and observations at the same time next day | Whether the chosen action improves the pattern |
For a persistent problem, a short fixed-camera recording during the peak can be especially informative. Record the same section after changes to a gate, feed route or push-up schedule, so the comparison is meaningful.
Match the investment to the measured restriction
| Main restriction | First improvement | Possible equipment or layout work |
|---|---|---|
| Feed regularly moves beyond reach | Revise push-up times and inspect the line | Automatic feed pusher route and settings |
| One section receives most of the ration | Correct delivery method | Mixer discharge arrangement and feed-delivery layout |
| Injuries or difficulty using headlocks | Inspect geometry and release functions | Appropriate headlock modules, mounting and repairs |
| Bottlenecks near drinking points | Improve circulation and water availability | Water trough arrangement, connections and gate positions |
| Smaller cows repeatedly lose access | Review group composition and placement | Pen partitions, gates and group-specific feeding positions |
| Too few serviceable positions for the group | Reduce stocking pressure or revise pen allocation | Additional bunk length, correctly sized headlocks and structural layout |
9. Plan the Feeding Area with NexAgri
For dairy projects, feeding-bunk planning starts with herd groups, usable feeding length, headlock configuration and the route cows take through the barn. Those inputs also determine where feed and water equipment will operate without obstructing cattle movement.
NexAgri can prepare feeding-position calculations, headlock arrangement drawings, feed-bunk and alley layout recommendations, equipment lists and installation drawings using the customer's herd information and dimensioned barn plan. Our equipment range includes dairy cow headlocks, TMR mixing systems, automatic feed pushers and livestock watering equipment.
To assess a new barn or an existing feeding line, send the cow numbers by group, a DWG or dimensioned plan, the current feeding-barrier details and photographs of the feeding and watering areas. Details of milking return routes and the feed-delivery equipment help turn the layout into a workable daily operation.
For projects involving headlock selection and mounting details, see our Headlocks Sizing and Installation Guide or contact NexAgri with your barn information.
Frequently Asked Questions
How much feed bunk space should I plan per dairy cow?
The 2023 Canadian Dairy Cattle Code recommends at least 60 cm per lactating cow and 76 cm per transition cow in freestall and bedded-pack housing. Check the total usable feeding edge and the actual headlock arrangement for each pen. A more generous allowance can be evaluated for groups with recurring competition.
Does one headlock equal one feeding place?
One functional headlock creates one defined opening, but actual simultaneous use depends on cow size, spacing and behavior. Count serviceable openings and observe peak occupancy; a pen with 100 cows and 80 openings has 125% stocking relative to installed openings.
Why do cows crowd one end of a feed bunk?
Compare fresh TMR distribution, feed reach, water access, crossovers and parlor-return routes in that area. If the crowding disappears after an even redistribution of the ration, feed access was contributing to the problem.
What should be checked before buying more headlocks?
Measure usable feed-edge length, count existing openings, inspect barrier dimensions and observe cow displacement. Also check the standing alley, crossings and group size. Those measurements show whether a new headlock line will add useful capacity.
Conclusion
Feed-bunk competition can be traced through a few practical observations: where cows gather, how feed is distributed, which animals are displaced and how much feeding space is available in that pen. The resulting measurements help the farm decide between changes to the feeding schedule, grouping, equipment settings and the barn layout.
A feeding-area plan should bring together the cows, the barrier, the ration and the circulation routes. With those elements measured on the same drawing, the farm can make targeted improvements and specify equipment that fits its daily operation.
