Short answer: Most cracked eggs are damaged long before they reach the crate, usually at the nest, on a sloped cage floor, during collection or in the store room stacks. Work out which stage the cracks come from by looking at their age and shape, then fix the single stage causing the most losses first. A breakage rate of a few per cent sounds small until you price it per week, so count it on every collection.
Key takeaways
- Most cracks happen before the crate, so look at the nest, the cage floor, collection and storage first.
- Old cracks look dirty and stained, while fresh cracks look clean and sharp, which tells you when the damage happened.
- Tally cracks by stage for two weeks, then fix the one stage that causes the most losses.
- Thin shells break more easily in the heat, so breakage and shell quality often rise together.
- A few per cent breakage on a small flock adds up to crates of lost eggs in a single month.
Find the moment the egg cracked
A cracked egg at the crate is the last of several chances it had to break. By the time a buyer sees it, the damage happened somewhere on the farm, and usually at one specific stage. The farmers who cut breakage fastest are the ones who stop asking why eggs crack in general and start asking at which step this particular egg did.
Think of the egg's route as a line of stages: the nest, the cage or floor, the collection round, the store room, the sorting bench and the crate. Each stage has its own cause and its own fix. Lumping them together is how a farm spends a month adjusting feed when the real problem is a steep wire floor in the second row of cages.
Reading the crack: fresh, old and hairline
The crack itself tells you when it happened. A fresh crack has clean, sharp edges and no dirt inside the line. An old crack has been exposed to dust, droppings and moisture, so it looks stained, rounded and sometimes filled with grime. If most of the cracks you find are old, the damage happened earlier in the flow, perhaps several days before the eggs were collected.
Hairline cracks are the hard ones. They can pass the eye and still let bacteria in, and they often show only when you hold the egg up to a light. That is why candling matters. Our guide to egg candling covers how to check without damaging the good eggs. Mark any egg with a suspected hairline crack, and keep it out of the clean crate.
Look at the shape too. A crack running along the long axis of the egg often points to a knock against something hard or against another egg. A cluster of small cracks around one spot often means the egg was pressed or dropped on that point. Shape is not a diagnosis, but it narrows the list of stages you need to check.
At the nest: the first moment of risk
The nest is the first place an egg meets anything hard, so it is where cracks start more often than most farmers expect. A nest with a bare wire floor, a worn plastic base or a hard board under thin litter gives the egg nothing to land on. A hen that steps off the perch edge onto the nest lip can crack an egg she never sees.
Watch for hens that stand on the edge of the nest, leave it in a hurry, or lay in the corners instead. Those habits make a hard landing more likely, and they often lead to floor eggs as well. Our guide to nest boxes for layers covers the design details, including litter depth and lip height.
Run a quick test on an empty day. Take an egg you were going to discard, never a saleable one, and drop it from the height a hen would land from, onto the surface of the nest. If the egg cracks in the test, the surface is the problem, not the hen. Fix the base before you blame the flock.
Cage floors and the slope nobody measures
In cage systems the egg is designed to roll. The floor slopes so the egg runs to the front and onto a collection belt, and that roll is where many cracks begin. A slope that is too steep sends the egg across the wire at speed, and it hits the belt or the wire lip hard. A slope that is too shallow lets the egg sit on the wire, where a hen can step on it or where it cracks under her weight.
Wire spacing matters as well. Wide spacing lets an egg drop through, while a wire that is too close can pinch or scratch the shell. When the house is empty, check the floor for bent or lifted wires, and make sure the belt runs freely. A worn belt or a rusty wire lip makes cracks that look exactly like collection damage, so do this check before you blame your staff. The comparison of the two is in our article on battery cage and deep litter, which runs both together.
Cage fill is a related cause. A cage packed beyond what it was built for means more hens crowding the front, more eggs rolling at the same time and more knocks at the belt. Crowding also stresses the hens, and stressed hens lay more irregular eggs.
The tray, the drop and the hard landing
Every time an egg moves from one surface to another, it takes a small knock. Most of those knocks do no harm on their own. Stack them up over a session of collection and they add up. The usual culprits are eggs tipped from one tray into another from a height, trays that are not level and so push the eggs into each other, and eggs set down on a hard table rather than a cushion.
Work out where your drops happen. Walk one tray from the house to the store room and note every hard landing: the nest edge, the belt, the table and the lip of the tray. Each one is a small chance to crack. Cutting the number of landings is usually quicker than trying to make every one gentler. Put a soft liner on the table, lower the height of each transfer and stop tipping trays straight into stacks. Our routine for egg collection and handling covers the round itself, so this section is about the surfaces the eggs cross on the way.
Store room stacks and the weight at the bottom
Eggs in a store room are often the forgotten stage. Trays get stacked to save floor space, and the bottom trays carry the weight of everything above. Eggs with a weak shell or a hairline crack will split under that load, and the damage will look as if it came from the farm, even though the store room caused it.
Keep stacks to a height the store can hold without leaning, and never stack trays on a floor that slopes or is uneven. Put a level board under any stack that sits on a damp floor. Store eggs in a cool, shaded room away from direct sun, and check the bottom trays once a day for slumping or cracks forming under the load. A tray that is sagging should be emptied and inspected before anything else goes on top of it.
A damp floor makes things worse. Dirt and moisture reach a cracked egg and speed up its decline. For cooler and drier conditions that protect eggs already in the store, see how to store table eggs.
Sorting and handling: the crack you make yourself
Rough handling in the sorting room is an easy mistake to miss, because the person doing it often does not feel the egg crack. A quick slide across a table, a tap of one egg against another to check size, or a grip that is too firm all leave cracks. Sorting onto a hard surface makes it worse. A cushioned table, a light grip and a steady pace are cheap changes that pay back quickly.
Do not sort in a rush at the end of the day, when people are tired and the eggs have been sitting. Schedule sorting in daylight, give it enough time and rotate the people who do it if you can. The best sorter on the farm is the one who checks each egg most carefully, not the one who is fastest.
When the shell itself is weak
Some cracks have nothing to do with handling. A shell with thin or uneven calcium cracks under a load that a good shell would carry without a mark. Heat is the common reason in Ghana. Hot weather reduces shell quality, so a flock that lays well in the cooler months can start losing eggs once the temperature climbs. If your breakage rises with the heat, read our guide to soft-shelled and thin-shelled eggs for the causes and the feed side, and summer heat and egg drop for the house changes that help.
Look at a few eggs from the same nest against a light, and note any thin or patchy areas in the shell. This is not a grading method for sale. It tells you whether the shells are changing across the flock, and that change is the one to act on quickly.
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What breakage costs, worked out per week
Breakage looks small until it is priced. Take a flock of 280 hens laying at about 80 per cent, which gives around 224 eggs a day. If 3 per cent of those are cracked or broken before they reach the crate, that is roughly 7 eggs a day, or about 47 in a week.
A crate of 30 table eggs sells at GH₵50 on our list, roughly GH₵1.67 an egg. Value the lost eggs at that rate, and the breakage costs about GH₵78 a week. Some cracked eggs can be sold at a lower price or used at home, which recovers part of the loss, but the cracked eggs are still money that never reaches the crate.
Now run the same sum on your own numbers. Count the eggs the flock laid this week, count the cracked ones at collection and again at the crate, and multiply the difference by your own price. The result tells you how much a single stage is worth fixing. Our notes on packing and transporting table eggs show where the crate-stage losses tend to come from.
A one-day breakage audit
You can find the stage that matters most in one working day, using nothing more than a tally sheet and a pencil. Set up four tally columns, one for each stage: the nest and house, the collection round, the store room and the packing point. Every time you find a cracked egg, put a tick in the column where you think it happened, and note whether the crack is fresh or old.
- Tally every cracked egg you find at collection, with a guess at the stage and a note of fresh or old.
- Repeat the tally at the store room check and again at the packing point.
- At the end of the day, add up the columns and find the biggest one.
- Fix that stage first, and only that stage, for one full week.
- Repeat the audit after two weeks and compare the columns with the first set.
A farm that does this twice usually finds that its biggest problem is not the one it expected. The most common surprise is that cracks blamed on the hens were made by a worn belt or a hard table.
Where the crack happens, and the first fix
Match what you see against the stage most likely to blame, using this table. Treat it as a starting point for the audit, and confirm each guess with the tally before you spend money.
| Stage | Typical sign | Likely cause | First fix |
|---|---|---|---|
| Nest and house | Fresh cracks, cracks at one point, floor eggs | Bare or hard nest base, landings from the perch edge | Add litter and a soft lip, lower the nest edge |
| Cage floor | Cracks along the long axis, eggs damaged at the belt | Steep slope, rough wire, worn belt | Check the slope, straighten wires, replace the belt section |
| Collection | Fresh cracks on eggs picked up from the floor or the belt | Hard surfaces, tipping, rushed rounds | Cushioned trays, slower transfers, lower drop height |
| Store room | Old cracks, bottom-tray damage, sagging trays | Stacks too high, uneven floor, damp | Lower the stacks, level boards, cool shaded room |
| Sorting bench | Fresh cracks on the sorting table | Hard surface, rough handling, end-of-day rush | Soft liner, light grip, sort in daylight |
| Shell quality | Thin shells, cracks under light pressure, worse in heat | Heat, calcium, age, disease | Vet check, feed review, house cooling |
If the table points to shell quality rather than handling, the fix is slower. Calcium and the house climate both take weeks to show, so give any change a fair run before you judge it.
A breakage checklist for the week
Work through this list once a week, and tick each line in the record. It takes about fifteen minutes once the habit is set, and it catches most stage problems before they cost a full crate.
- Check the nest base and lip in every nest each morning.
- Look at the cage floor slope and the belt before each collection.
- Lower the height of every tray transfer and use a soft surface for each one.
- Keep store stacks low and off uneven floors, and check the bottom trays daily.
- Sort in daylight, lightly, on a cushioned surface.
- Candle any suspicious egg before it is packed.
- Record each cracked egg by stage and by fresh or old, every day.
- Re-count the breakage rate every two weeks and compare it with the last count.
If the numbers do not improve after a fortnight of fixing the top stage, call your vet to rule out shell problems. Send any further questions through our frequently asked questions page or on WhatsApp at +233 24 915 1503. When you are planning a fresh flock, our layer chick page sets out the options.
Questions farmers ask
What is an acceptable breakage rate for table eggs in Ghana?
There is no single figure we can give you, and you should treat any number quoted to you with care. The useful target is the one you set from your own baseline, then bring down steadily. Measure for two weeks first, then track the trend. Buyers judge you on what reaches them, so the crate is the point that counts.
How can I tell whether a crack happened on the farm or in transport?
Look at the age and the pattern. Old, stained cracks suggest the damage happened earlier, often in storage or collection. Fresh cracks found in the same place across many eggs in one crate point to packing, and fresh cracks spread across a whole load point to the road. Our article on packing table eggs covers the transport side in detail.
Are cracked eggs safe to eat?
A cracked egg should not be sold as a clean egg, because the broken shell lets bacteria in. Keep cracked eggs out of the saleable crate and use them promptly at home only if you cook them thoroughly, following basic food safety guidance. Discard any egg that smells wrong or has a dirty, leaking crack.
Will changing the feed fix cracked eggs?
Rarely on its own. Calcium and vitamin D3 matter, and feed quality counts, but most farms with breakage also have a handling or house problem. Audit the stages first, then review the feed if the shell problem remains after the handling is fixed.
Should I wash cracked eggs so I can sell them?
No. Washing does not repair a cracked shell, and a cracked egg should not be sold as a clean one. Remove it from the saleable stock and deal with it separately.
Why do older hens crack more eggs?
Eggs get bigger as hens age, and shells often thin out with them, so older birds are more prone to weak shells. Look at the trend across the lay cycle and compare it with the feed and the house. If the decline is sharp, talk to your vet before assuming it is simply age.
Does the breed affect how strong the shells are?
Yes, to some degree. Strains differ in shell quality and laying performance, and our breeds page sets out what we stock. Choose the breed for lay and hardiness first, then protect the eggs through good house design and careful handling. Breed alone will not stop cracks if the other stages are weak.
