Layer Feeding Guide

A layer eats four different feeds across her life, and the change that carries the most weight is the calcium jump at point of lay. This layer feeding guide sets out chick mash, grower mash, a short pre layer feed and layer mash, with the Ugandan figures for protein, energy and calcium at each stage. Time that switch wrong in either direction and the flock pays for it all cycle.

The Four Feeds a Layer Eats, and When Each One Changes

MAAIF's poultry training manual specifies the phases by nutrient content rather than by brand, which is the useful way round. A starter pullet feed runs from day old. A grower feed follows it. A pre layer feed bridges the last fortnight before the first egg. Layer feed then runs to the end of the cycle, with its own internal steps.

Where the manual is less tidy is the exact week each phase ends, and it is worth knowing that before you plan a feed order. Its phase specification table puts the starter at 0 to 10 weeks and the grower at 10 to 20 weeks. Its worked budget for a layer house allows chick mash to week 8 and grower mash from week 9 to week 18. Its feed consumption table implies a later change again. Three versions in one document.

The resolution is in the same manual, in a different section. It tells you to weigh ten percent of the flock every week and compare against the standard for the strain. Weight, not the calendar, is what the feed change should follow. Read the boundaries below as a working plan and let the scales override them.

Energy runs the other way from protein. MAAIF puts the starter at 2,700 kcal of metabolisable energy per kilogram, drops the grower to 2,600, then lifts layer feed to 2,800 and holds it there for the rest of the cycle. Sodium stays at 0.16 to 0.17 percent throughout. Available phosphorus starts at 0.48 percent and falls gradually to 0.36 percent by the end of lay.

If you want the nutrient specification on its own without the management around it, layer feed requirements carries it. Poultry feed types explained covers what mash, crumb and pellet actually mean.

Chick Mash for Layer Chicks From Day Old to Week 8

Chick mash is the highest protein feed a layer will ever eat and the smallest quantity of it. MAAIF's specification is 18 to 19 percent crude protein, one percent calcium, 0.4 to 0.5 percent methionine and one percent lysine. Day old birds do better on crumbs than on coarse mash, because they cannot swallow large particles.

Quantities are modest and that is what catches people out. A chick eats about 11 g a day in week one, 32 g by week four and 50 g by week eight. Cumulative intake reaches roughly 1.8 kg by the end of week eight, and MAAIF's budget allows 2 kg per chick to cover that period with wastage. Two kilograms of feed to produce a bird you will then feed for another seventy weeks.

Insoluble grit belongs in this phase for gizzard development. MAAIF's layer breeder feeding programme gives 3 g per bird per week from week three to week ten, rising to 4 to 5 g per bird per week after that. Those figures come from the breeder section of the manual rather than the commercial layer section, so treat them as the order of magnitude rather than a precise commercial requirement.

Brooding and feeding are the same job in the first fortnight, and the poultry brooding guide handles the temperature and litter side of it.

Grower Mash and the Layer Pullet Weight That Decides the Peak

Protein drops when the bird moves onto grower feed, from 18 or 19 percent down to 15. That fall is deliberate, not a saving. A pullet in the growing phase is building frame and feather, and pushing more protein at her does not build a better layer.

Calcium barely moves, from one percent to 1.1. Hold that figure in mind, because it is the number that makes the next section matter.

What the grower phase is actually for is body weight. MAAIF states the target flatly: by the end of week 18 the flock should average 1,450 to 1,500 g, and only then is a good peak likely. A Kampala hatchery's own practical performance sheet puts week 18 at 1,500 g and MAAIF's own consumption table puts it at 1,475 g, so two independent Ugandan sources land in the same place. The waypoints along the way run close to 600 to 630 g at week eight, 760 to 810 g at week ten, 930 to 1,000 g at week twelve and 1,300 to 1,350 g at week sixteen.

Where a flock is falling behind those weights, MAAIF suggests midnight feeding, a short spell of light and feed between ten at night and midnight, to fit one more meal into the day. That only helps if you knew the flock was light, which is the whole argument for weighing birds instead of looking at them.

MAAIF's budget allows 5 kg of grower mash per pullet across weeks 9 to 18, which sits a little under the cumulative figures above and is the number to plan purchases from.

Why the Calcium Jump at Point of Lay Runs the Whole Layer Cycle

Grower feed carries 1.1 percent calcium. Layer feed at the start of production carries 3.8 percent. That is more than a threefold step, and it exists because a hen laying an egg a day is building a shell every night out of her own blood calcium. Nothing else in the layer's diet changes by that much at any point.

Between the two sits a pre layer feed. MAAIF runs it from week 17 to week 19, describing it as a grower feed with more calcium than ordinary grower mash, given to prepare the birds for laying. The nutrient figures for it sit in the manual's own specification table, which carries a pre lay mash row at 2,740 kilocalories, 17.5 percent crude protein and 2.1 percent calcium. That calcium figure is the whole point of the phase, sitting between the grower's 1.1 and the layer's 3.8 rather than jumping straight to the top. The manual is specific about when the birds come off it: switch to full layer mash when the flock reaches two percent production. In other words, when eggs actually start appearing, not on a date you wrote down in week one.

That is the whole decision, and it can be got wrong in two opposite directions.

Getting this right is also why the rearing period matters so much. Layer farming in Uganda sets the whole cycle in order, including why the four months before the first egg decide the rest.

Layer Mash Through Peak and Into Late Lay

Layer feed is not one feed. MAAIF splits it three ways and moves two nutrients in opposite directions across the cycle. Protein steps down from 17 percent at the start of production, to 16.5 percent from week 40, to 16 percent from week 55. Calcium steps up from 3.8 percent, to 4 percent, to 4.2 percent over the same stretch.

Both moves follow the same underlying change in the bird. Egg weight climbs steadily through the cycle, so the shell has to cover a larger surface with the same thickness, and MAAIF notes plainly that the larger eggs laid at the end of the laying period can have weaker shells. Meanwhile the hen's requirement for protein per egg is falling slightly as her rate of lay declines.

One detail from the manual's shell quality guidance is worth acting on directly, because it costs nothing. Shell is mainly deposited at night. So the hens need to have fed well before the dark period starts, which means feed in the troughs in the late afternoon rather than an empty run at dusk. Where hens are not feeding well before dark, the manual points at disease or high house temperature as the reason to investigate.

How Much Feed a Layer Eats Per Day and Per Cycle

Here the Ugandan sources disagree with each other and the disagreement is worth working through, because feed is most of the cost of keeping a layer.

MAAIF's feed consumption table gives 95 g per bird per day for layer mash from week 20 to week 80. The prose in the same manual says mature layers consume an average of 125 to 135 g a day. A Kampala hatchery publishes 122 to 123 g a day for its laying flocks. Published breeder standards for a commercial brown layer give 109 to 117 g a day averaged across the whole laying period.

The manual settles its own argument elsewhere. Its worked budget allows 50 kg of layer mash per bird for weeks 19 to 80, which is 62 weeks, or 434 days. Fifty kilograms over 434 days is about 115 g a day. That figure agrees with the hatchery and with the breeder standard, and it puts the 95 g in the consumption table on its own as the outlier.

So plan on about 110 to 125 g a day for a laying hen in a Ugandan house, and expect the exact figure to move with the energy density of the feed, the size of the bird and how hot the house gets. Birds eat less of a high energy ration and less of any ration when they are panting.

Water tracks feed and then overtakes it in heat. MAAIF's table gives 220 to 230 ml a day at laying age and its prose says 300 to 350 ml, while the breeder standard runs 165 to 236 ml. Two hundred to two hundred and fifty millilitres is the working figure on a normal day, and considerably more on a hot one.

For the whole cycle, MAAIF's own budget adds up to about 57 kg of feed per bird from day old to week 80: 2 kg of chick mash, 5 kg of grower mash and 50 kg of layer mash. That is the number to build a feed order around. The poultry feed calculator turns it into sacks per week for your own flock size.

Calcium Sources for Shell Quality in Layer Feed

A layer ration hitting 3.8 to 4.2 percent calcium needs a dedicated calcium ingredient, and MAAIF's table of mineral sources gives the Ugandan options with their contents. Limestone is the strongest at 45 percent calcium and almost no phosphorus. Calcium carbonate comes in at 38 percent. Dried and ground lake shells, which are widely available around Uganda's lakes, carry 35 percent. Bone meal gives 30 percent calcium alongside 17 percent phosphorus, and dicalcium phosphate 23 percent calcium with 18 percent phosphorus.

The calcium figure is not the only thing separating them. Bone meal and dicalcium phosphate bring phosphorus with them, which matters because MAAIF's own layer specification wants available phosphorus falling through the cycle rather than rising. Limestone and shell give calcium without that complication, which is why they are the usual backbone of a layer ration and the phosphate sources are used in smaller quantities.

Shell grit fed separately alongside the mash is common Ugandan practice, and it lets individual hens take what they need rather than relying on the mixer. Nothing in the Ugandan sources gives a separate grit quantity for laying hens, so treat the mash specification as the requirement and the free choice grit as insurance rather than a measured ration.

Mineral supplements for livestock covers the premix side, and how to formulate poultry feed works through building a ration from ingredients rather than buying it finished.

When Extra Calcium Will Not Fix Thin Shells in a Layer Flock

This is the part of layer feeding that farmers get wrong for the best of reasons. Shells go thin, so more limestone goes into the mash, and nothing improves. The reason is that heat, not calcium, is often the cause, and adding calcium cannot reach it.

A hot hen pants to lose heat. Panting is hyperventilation, so she blows off carbon dioxide, her blood pH rises, and the enzyme carbonic anhydrase that the shell gland depends on becomes less active. Less calcium and carbonate reach the shell gland, and the shell comes out thin. Breeder technical material on heat stress in layers states the consequence explicitly: increasing the amount of calcium in the diet will not correct this problem. Heat also cuts feed intake, so the hen eats less calcium at the same time.

Thin or odd shells have several causes and only some of them are feeding problems. MAAIF's own egg quality guidance attributes ridged shells to infectious bronchitis or to stress during laying, and puts an extra calcified ring on eggs laid six to eight hours late. Sorting out which one you have is the difference between a feed change that works and a feed change that wastes money.

The heat side of this belongs with production rather than nutrition, and egg production per layer works through what house temperature does to the tray count. The disease side sits with the layer vaccination schedule, since infectious bronchitis is on it.

Feed Quality, Adulteration and Aflatoxin in Ugandan Layer Feed

MAAIF's own list of the poultry sector's challenges is blunter than most commentary. It names many unregulated and unqualified feed manufacturers, limited enforcement of standards in the subsector, no feed reserves for production during the off season, and high levels of aflatoxins caused by poor quality feeds. Those are the ministry's words about the market you are buying in.

The manual goes further and flags specific ingredients. Groundnut cake, one of the highest protein raw materials available in Uganda, is described as contaminated with aflatoxins. Fish meal is described as highly adulterated and poorly processed, with heavy metal contamination, and held to an inclusion rate of 10 to 20 percent. Cotton cake carries gossypol that has to be treated out before use, and the permitted inclusion rate differs sharply depending on whether the cake was detoxified and husked. None of that is a reason to avoid these ingredients, which are the backbone of Ugandan poultry feed. It is a reason to know your supplier.

Aflatoxin costs more than a drop in the tray count. Immune suppression brought on by mycotoxins sits on MAAIF's list of the reasons vaccines fail, so one bad sack of bran can cancel protection the flock was correctly given. Birds breaking with something they were covered against send you to the feed store as well, and the layer vaccination schedule handles the rest of that investigation.

Price volatility is the other half of the quality problem. Maize makes up 60 to 70 percent of a poultry ration by MAAIF's own inclusion rates and soya bean cake up to 25 percent, so when those two grains move, most of the ration moves with them. That pressure is what turns a good formulation into a cheapened one mid cycle, and MAAIF's first listed challenge is exactly this: feed costs have escalated without a matching rise in the price of poultry products.

The individual ingredients have their own pages: maize bran in animal feeding, soybean meal in animal feeding and cotton seed cake in animal feed.

Mixing and Storing Layer Feed on the Farm

Mixed feed has a short life. MAAIF puts the shelf life of farm mixed feed at two weeks, beyond which it turns mouldy and unfit to feed, and the instruction that follows is to mix only what the flock will eat inside that window and to write the mixing date on the sack. Pack into waterproof sacks, and do not compact them, because compacted feed goes anaerobic and that is what encourages mould. Store dry, damp free and rodent free.

The maize going into the mix is where aflatoxin starts, and MAAIF gives a field test that needs nothing but a bottle and salt. Put a handful of dried maize grain and half a handful of table salt into an empty dry soda bottle. Shake it hard for two or three minutes, let the grain settle, and look at the walls of the bottle. Salt sticking to the glass means the maize is still too wet to store. Dry it further and repeat until nothing sticks. For bran and other cereal by products, the manual says to dry them thoroughly after processing and to check the bran is dusty rather than caking.

Two more things from the manual that separate a working mixing operation from a hopeful one. Get the formula from a qualified animal nutritionist rather than copying one, because the inclusion rates depend on what your raw materials actually contain. And send a sample of the mixed feed to a nutrition laboratory to check the result matches the formulation, which is the only way to know whether your mixer is doing what you think it is.

How to store animal feed safely goes into the store itself.

Layer Feeding Questions From Ugandan Farmers

How much feed will a layer eat over a full cycle, and what does that cost? About 57 kg per bird from day old to week 80 on MAAIF's own budget: 2 kg chick mash, 5 kg grower mash and 50 kg layer mash. The shilling figure moves constantly, because it is set almost entirely by the maize and soya markets, so check current poultry feed prices against maize prices close to when you buy rather than working from an older figure. In MAAIF's worked budget for a 500 layer house, the three feeds together account for well over three quarters of total expenses, which is the ratio worth remembering even when the prices underneath it have changed. Cost of raising 500 layers works the line items.

Is it cheaper to mix my own layer feed? Sometimes, and it carries a risk that a commercial sack does not. Mixing at home gives you control over which maize goes in, which is the main defence against aflatoxin, and it removes a margin. Against that, you need a formula from a nutritionist, accurate weighing, a real mixer or a great deal of patience with a spade, and the discipline to mix only two weeks at a time. A badly mixed ration is worse than an average bought one, because the minerals and vitamins end up unevenly distributed and some birds get none.

Can I feed layers on maize bran alone? No. Maize bran is an energy ingredient with a fibre limit on how much of the ration it can occupy, and it cannot come close to 17 percent crude protein or 3.8 percent calcium on its own. A bran heavy ration also drags the energy density down, and MAAIF notes that high fibre feed sits partly digested and holds back intake. Bran is part of a layer ration, not a layer ration.

My shells suddenly went thin and I did not change the feed. What happened? Look at temperature first, then disease, then the bird's age. A hot spell makes hens pant, which disturbs their blood chemistry and cuts calcium delivery to the shell gland, and adding more calcium to the mash will not fix it. Infectious bronchitis is a recognised cause of ridged and misshapen shells. Late in the cycle eggs get larger and shells thin for that reason alone, which is why the calcium specification rises to 4.2 percent from week 55.

Exactly when do I move from grower to layer mash? When the flock reaches two percent production, which is MAAIF's stated trigger, with a pre layer feed running through weeks 17 to 19 in the meantime. Two percent of a hundred birds is two eggs a day. Counting eggs from the first week of lay is what makes this decision possible.

Should I give shell or limestone separately on top of the mash? Free choice grit alongside the mash is common Ugandan practice and does no harm, and lake shell at 35 percent calcium or limestone at 45 percent are the sources to hand. Treat it as insurance rather than as part of the calculated ration, and keep the mash at the specification, because a hen who fills up on grit instead of feed has gained nothing.

How do I know whether feed I have bought is safe? You cannot tell aflatoxin by eye, which is the uncomfortable answer. What you can do is buy from a supplier you can go back to, refuse feed that smells musty or has caked in the sack, check the mixing or manufacture date, keep the sack rather than emptying it into a bin so you can trace a bad batch, and send a sample to a nutrition laboratory when a flock is underperforming with no other explanation. Storing it properly after you buy it is the half that is entirely within your control.

Finding Layer Feed and Checking What You Buy

Feed prices move with the grain markets, so compare quotes close to the date you buy and ask what is actually in the ration rather than only what the sack is called. Where to buy poultry feed lists dealers by region and poultry feed prices track what mash is going for. Work out your own flock's requirement with the feed calculator before you order, keep the mixing or manufacture date on every sack, and ask a qualified animal nutritionist or your district veterinary officer to look over a home mixed formula before you commit a whole flock to it.