How to Track Egg Production and Losses

A practical method for layer farmers in Uganda: count eggs once at collection, separate losses at collection from losses after collection, keep a simple egg stock record, and read trends from your own flock's history.

Published 2026-10-17

On a layer farm, the daily egg count is one of the clearest signals you have — but only if it is counted the same way every day, by flock or house, and only if every egg is counted once. Poultry record-keeping guidance treats production records as basic practice, because a flock can only be judged against its own recorded history.

Five words to keep separate

• Eggs collected: every egg picked up from a house in a collection round, including cracked, dirty and floor eggs. This is the one production count. Eggs laid but never found cannot be counted, so the collection count is the closest record of production you have.
• Collection-stage losses: eggs that were collected but are unusable at the moment of collection — for example broken or too dirty to use. They are part of eggs collected, never added on top.
• Usable eggs: eggs collected minus collection-stage losses. These are the eggs that go into your egg stock.
• Egg stock: usable eggs you are holding. It goes up when usable eggs are added and down when eggs leave it.
• Movements out of stock: sales, household or staff use, and gifts are not losses. Eggs broken, spoiled or missing in storage or transport are post-collection losses.

Record the collection, not an estimate

Choose one collection routine and keep it: the same rounds at roughly the same times, counted in one unit. Write the figure at the point of collection, not in the evening from memory, and use the date the eggs were collected.

• Date, and which round if there is more than one.
• House or flock.
• Eggs collected (all eggs picked up).
• Collection-stage losses, with the reason.
• Birds present in that house that day, and any deaths or culls.
• Who counted.

Record by flock or house, not only a farm total

A farm total can hide a problem: one house can fall while another rises and the total stays the same. Record each house or flock separately, then add them up if you need a farm figure. Keep the flock name the same from placement to depletion so its history stays together.

Keep a simple egg stock record

Once eggs are usable, everything that happens to them is a stock movement, not production. A stock line is simple: opening stock + usable eggs added − sales − home and staff use − gifts − post-collection losses = closing stock. Write each movement on the day it happens, with its reason.

When you count the store and the physical count differs from the closing stock, investigate the difference first: recheck the count, the sales and home-use entries, the loss entries and the handover figures. A documented stock adjustment with a note can then bring the book into line with the count, but it does not explain why the difference happened. Do not change the collection figure, do not call the difference a production loss, and do not record an unexplained difference as broken, spoiled or missing eggs — those are only for losses you actually saw or confirmed.

Avoid double counting

• Count each egg once, when it is collected from the house.
• Eggs moving into the store, being sold or used at home are movements of eggs already counted — never a new production entry.
• A collection-stage loss is part of the collected figure; do not add it to it.
• A loss found after collection reduces stock; it does not reduce the original collection figure.
• At a shift handover, write down who counted and the figure handed over, so the next person does not count the same trays again.

Record corrections openly

Mistakes happen: a miscount, a figure written against the wrong house, a loss recorded twice. Do not erase the original. Add a dated correction that says what was wrong, what it should be, and who corrected it. A visible correction keeps the history; an erased one destroys it.

A worked example

All figures below are fictional, invented only to show how the numbers fit together. They are not targets and not normal values for any breed or farm.

• One house, one day: 1,250 birds present; 1,000 eggs collected.
• Collection-stage losses: 20 broken + 10 too dirty to use = 30. Usable eggs = 1,000 − 30 = 970.
• Stock: opening 50 + 970 added = 1,020 available.
• Movements out: 900 sold, 40 home and staff use, 5 broken in the store, 3 missing. Closing stock = 1,020 − 900 − 40 − 5 − 3 = 72.
• Physical count of the store: 70. Stock adjustment: −2, recorded with a note. Final stock 70.
• Check — every egg is counted once: 30 (collection-stage losses) + 900 + 40 + 8 (post-collection losses) + 2 (adjustment) + 70 (final stock) = 1,050 = 50 opening + 1,000 collected.

Simple calculations, with their denominators

• Eggs collected per 100 birds present (day) = eggs collected ÷ birds present that day × 100. Example: 1,000 ÷ 1,250 × 100 = 80.0%. This is a simplified collection indicator, not necessarily the formal hen-day egg production figure, which follows its own definition of hens and days.
• Collection-stage loss share = collection-stage losses ÷ eggs collected × 100. Example: 30 ÷ 1,000 × 100 = 3.0%.
• Post-collection loss share = post-collection losses ÷ eggs available in stock (opening + usable added) × 100. Example: 8 ÷ 1,020 × 100 ≈ 0.8%.
• Sales and home use are not losses and are not included in either loss share.
• Weekly daily average = total eggs collected ÷ number of days actually recorded. Example: 6,300 eggs over 7 recorded days = 900 per day. If only 6 days were recorded, divide by 6 and mark the week incomplete.

If a day was not recorded, leave it empty rather than writing a guess. A visible gap is information; an invented figure is not.

Reading daily and weekly trends

Single days move for harmless reasons — a late collection, a different person counting. What is worth attention is a direction that holds for several days, or a weekly average that keeps falling for the same flock. When you see one, check what else your records show for the same days — deaths and culls, feed and water, vaccinations, weather, a new feed batch, a change in who collected — and discuss it with a veterinary or extension officer rather than guessing a cause.

A practical daily routine

• At each collection: count all eggs, note collection-stage losses with reasons, the house and your name.
• End of day: add up per house, record birds present, deaths and culls, and write the day's stock movements.
• Weekly: count the store, record any adjustment with a note, total each flock and compare with the previous week.
• Monthly: review losses by reason and stage, which shows whether the problem is in the house, in handling or in storage.

Keeping it in a book or in software

A ruled book with fixed columns is a good start. Its weakness is summarising, which has to be done by hand. In HERD IQ Poultry, egg collections are recorded against a flock and are not edited afterwards; eggs lost after collection are recorded separately as Broken, Spoiled or Missing (Missing needs a note), they reduce egg stock, and a loss cannot be larger than the eggs in stock. A wrong loss entry is not deleted — a farm Owner, Admin or Manager records a reversal with a reason, so both entries stay in the history. Whichever you use, count once, record movements separately, and correct openly.

This guide is general educational information for farmers and is not veterinary advice.

This guide is general farming guidance, not veterinary advice. Consult a qualified veterinary or extension officer about your own animals.