Mechanical egg collection — belts and nests in the hen house
In larger poultry houses eggs are collected mechanically — without walking manually between rows. A hen lays an egg in a nest, the egg rolls onto a belt, the belt moves it to a single point, and from there it goes to a collection table or straight to a packer. We explain how the system works step by step, what components it consists of, and what to watch out for.
verifiedFrom the team that has organised work on poultry farms for years.
In a small backyard coop the farmer collects eggs by hand, walking between the nests. But when there are hundreds or thousands of hens, manual collection takes too long and results in too many breakages. That is why larger farms use mechanical systems — belts and nests that carry eggs from the laying point all the way to the collection table or packer.
Why does mechanical egg collection matter?
Fast, gentle collection means fewer breakages and cleaner eggs. The longer an egg lies in a nest or on the litter, the greater the chance it will be cracked by other hens or get dirty. Mechanical collection reduces that time to a minimum. A clean, undamaged Class A egg brings higher revenue and fewer losses. The collection system connects with the housing descriptions in the guides on laying hen farming and cage, litter and aviary housing.
When does mechanical collection pay off?
A small farm can use simple manual nests without belts. Mechanical systems start to pay off from a few hundred hens — the larger the flock, the more labour saved and the fewer breakages. In multi-tier aviary housing, belts and elevators are practically indispensable, because manual collection from several levels would be very difficult.
How an egg gets from the nest to the table — stage by stage
The whole system can be divided into three main stages: laying in the nest, belt transport, and collection at the table or packer.
The hen lays an egg in the nest
A nest is a darkened, comfortable box — hens instinctively seek such places for laying because in nature they hide their eggs. A good nest is lined with a soft mat or bedding, lightly darkened, and roomy enough for one hen. The hen enters the nest, lays the egg and leaves — the egg stays inside.
The egg rolls onto the nest belt
The nest floor is slightly inclined — usually by a few degrees towards the belt. The laid egg gently rolls from the mat onto the nest belt running along the entire row of nests. The belt moves slowly so eggs do not hit each other with force. It is the inclined floor and slow belt that protect eggs from breakage at this most critical moment.
The collection belt gathers eggs from rows
The nest belts from each row deposit eggs onto one larger collection belt running along or across the house. If the building has several levels (aviary housing), eggs from the upper tiers are transported by a lift or spiral elevator that gently lowers them to the working level. At this stage it is important that the transitions between belts are smooth and free of abrupt drops.
What makes up an egg collection system
Every mechanical egg collection system consists of several basic components. Their quality and condition determine the number of breakages and the cleanliness of the collected eggs.
Nests — individual and group
An individual nest holds one hen at a time and has its own inclined floor. A group nest (row nest) is a long, shared box for several hens simultaneously — the belt runs the full length. Automatic nests have a night-closing mechanism (sometimes called a "blade" or moving floor) that pushes hens out of the nest at night so they do not sleep inside and soil it with droppings. Nests that are clean in the morning mean clean eggs throughout the day.
Nest belts and collection belts
The nest belt is a narrow belt running along the nest outlets — it picks up eggs directly from the boxes and moves them to one point. The collection belt (main belt) gathers eggs from multiple nest belts and carries them to the table or packer. Belts must be cleaned regularly, because residue of droppings and broken eggs that sticks to the belt surface transfers to eggshells and reduces their cleanliness.
Collection table and packer
The collection table is where a worker picks up eggs from the belt, inspects them visually, and removes broken or dirty eggs. A packer (grading machine) automatically arranges eggs on trays by weight or class. On smaller farms a table suffices — on large operations packing is fully automatic. Regardless of the solution, the table and all surfaces that contact eggs must be regularly disinfected.
The most common problems in egg collection
Even a good system produces poor results if it is badly set up or neglected. Here is what to avoid.
Floor eggs — laying outside the nest
Floor eggs are eggs laid on the litter outside the nest. They are dirtier, more often broken, and must be collected by hand. They occur when there are too few nests, they are opened too late, or they are poorly positioned. How to reduce them: provide the right number of nests (roughly 1 nest per 6–8 hens), open nests two weeks before first laying, set lighting correctly — hens prefer to lay in darkened spots rather than on brightly lit litter. More about housing conditions in the guide on aviary system for laying hens.
Dirty belts and breakages through neglect
If belts are cleaned infrequently, residue of droppings and broken eggs sticks to the belt surface and transfers to subsequent eggs. This also causes eggs to stick to the belt, leading to more breakages. Regular cleaning of belts and the collection table is the foundation of egg hygiene. Shell cleanliness directly affects egg class — details in the guide on egg quality assessment and Haugh units.
Frequently asked questions about mechanical egg collection
What is mechanical egg collection?add
In a mechanical egg collection system a hen lays an egg in a nest with a slightly inclined floor. The egg rolls from the nest onto a nest belt, which moves it along the row to a collection belt. The collection belt carries the eggs to a collection table or packer at the exit of the house, where a worker or machine picks them up and packs them. This way eggs reach the collection point quickly without the farmer having to collect from each nest individually.
Why is the nest floor inclined?add
The inclined floor causes the egg to roll off the nest onto the belt immediately after laying. The hen does not sit on it for long, so the egg is cleaner and the risk of it being broken by other hens is lower. Without the incline, eggs would remain in the nest, hens would step on or crack them, and the farmer would have to collect them by hand.
What are floor eggs and how do you reduce them?add
Floor eggs are eggs laid on the litter outside the nest. They are dirtier and more often broken than nest eggs. They are reduced by providing the right number of nests (roughly 1 per 6–8 hens), opening nests early (before first laying), darkening nests properly, and setting lighting correctly — bright litter encourages hens to lay on the floor.
What is the difference between a nest belt and a collection belt?add
The nest belt runs directly alongside the nests and collects eggs from them — it is the first belt the egg reaches after rolling off the nest. The collection belt is wider and longer, it gathers eggs from multiple nest belts and transports them to the collection table or packer at the house exit.
What is the purpose of the night-closing mechanism on nests?add
The automatic night-closing mechanism prevents hens from entering nests at night. Hens that sleep in nests soil them with droppings, which transfers to the shells of eggs laid in the morning. Closing nests at night keeps them clean and reduces the proportion of dirty eggs without extra labour.
How does egg structure relate to the collection system?add
The eggshell is the first barrier protecting the contents from microorganisms. Mechanical collection reduces shell damage and contact with litter dirt. The sooner the egg reaches a clean belt rather than remaining in a nest full of hens, the better its properties are preserved. More on egg structure and what affects quality in the guide on egg structure.
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