Protein Requirements for Laying Hens: Meeting Egg Production Demands

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-14

Key Takeaways

Laying hen protein requirements are best expressed as daily intake (17-19g crude protein/day during peak lay) rather than solely feed percentage, as feed intake fluctuates significantly with temperature and age.
Methionine (0.36-0.42% of diet) and lysine (0.70-0.80% of diet) are the primary limiting amino acids, directly impacting feather formation, egg size, and albumen quality.
Hot weather necessitates increasing dietary protein percentage (e.g., to 17.5-18.5%) to compensate for reduced feed intake and maintain adequate daily protein and amino acid supply.
Protein deficiency manifests as reduced egg size (within 7-10 days, especially methionine deficiency), feather loss, and declining egg production and body weight (within 2-3 weeks).
Excess protein (above 19% crude protein without specific reason) leads to increased water consumption, wet litter, elevated ammonia levels, and potential kidney stress, rather than improved production.
Transitioning pullets to a layer ration at 17-18 weeks of age or upon the first egg is critical to meet the elevated protein and calcium demands for early egg formation and shell quality.

Protein is the single most expensive nutrient in a laying hen's diet, and it is also the one most directly tied to egg output. When protein levels fall short, egg production drops, egg size shrinks, and hens lose body condition. When protein levels are excessive, you waste money and stress the birds' kidneys and liver for no gain. This guide explains exactly how much protein laying hens need at each stage of lay, which amino acids matter most, how to adjust rations for temperature and age, and how to troubleshoot production problems that trace back to protein. It is written for small flock owners, commercial egg producers, feed mill operators, and anyone advising farmers on layer nutrition.

At a Glance

Standard layer rations contain 16 to 18 percent crude protein for brown egg layers and 15 to 17 percent for white egg layers during peak production.
Methionine and lysine are the first and second limiting amino acids in layer diets. Methionine should be 0.36 to 0.42 percent of the diet and lysine 0.70 to 0.80 percent depending on feed intake.
A laying hen needs about 17 to 19 grams of crude protein per day during peak lay, dropping to 15 to 16 grams per day in late lay.
Feed intake drives protein needs. Hens eating 100 grams of feed per day need a higher percentage protein than hens eating 120 grams per day.
Hot weather reduces feed intake by 10 to 15 percent, so protein levels in the ration must increase to maintain daily protein intake.
Pullets should move to a layer ration at 17 to 18 weeks or when the first egg appears, whichever comes first.
Feather loss, reduced egg size, and a drop in production are the first visible signs of protein deficiency.
Do not feed more than 19 percent crude protein to laying hens without a specific reason, as excess protein increases water consumption, wet litter, and ammonia levels in the house.

Understanding Protein Needs in Laying Hens

Protein is not a single nutrient. It is a collection of amino acids that the hen assembles into egg white, egg yolk proteins, muscle tissue, feathers, and enzymes. When you formulate a layer ration, you are not just hitting a percentage on the feed tag. You are delivering enough of each essential amino acid to support the physiological work the hen is doing.

A laying hen partitions protein toward three competing demands. The first is egg production. Each large egg contains roughly 6 to 7 grams of protein, with about half in the albumen and half in the yolk. The second demand is body maintenance, which includes repairing tissues, growing feathers during molts, and supporting organ function. The third demand is body weight gain, which matters most in young hens that are still growing when they come into lay.

The hen prioritizes these demands in a predictable order. Survival and basic maintenance come first. Egg production comes second. Body weight gain comes last. If dietary protein is inadequate, the hen will continue to lay for a short time by pulling amino acids from her own muscle tissue, but this cannibalization cannot continue indefinitely. Within days to weeks, egg production will decline, and the hen will lose visible body condition.

The Role of Amino Acids

Crude protein percentage tells you how much nitrogen is in the feed, but it does not tell you how useful that protein is to the hen. What matters is the amino acid profile. A feed can test at 18 percent crude protein and still be deficient in methionine if the protein sources are poorly chosen.

There are 10 essential amino acids that laying hens cannot synthesize themselves and must obtain from the diet. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. Of these, methionine and lysine are the ones that most often limit performance in practical rations.

Methionine is the first limiting amino acid in most layer diets. It is needed for feather formation, egg shell quality, and the synthesis of cysteine, another sulfur-containing amino acid. A deficiency in methionine shows up as feather pecking, poor feather cover, and reduced egg size before it shows up as a drop in egg numbers.

Lysine is the second limiting amino acid. It is critical for muscle development and egg white protein synthesis. Lysine deficiency reduces egg weight and albumen quality, and it accelerates body weight loss in hens that are already in negative protein balance.

Other amino acids matter too, but they are usually adequate if methionine and lysine are correct and if the diet uses a reasonable mix of protein sources. Threonine becomes limiting in some low-protein diets, and tryptophan can matter in high-stress situations, but these are less common problems in commercial practice.

Protein Intake versus Protein Percentage

One of the most common mistakes in layer nutrition is thinking only about the percentage of protein in the feed bag. The hen does not eat a percentage. She eats a quantity of feed each day, and her protein intake is the product of feed intake multiplied by dietary protein concentration.

A hen eating 110 grams of feed per day at 16 percent protein receives 17.6 grams of protein. A hen eating 95 grams of feed per day at 17 percent protein receives 16.2 grams. The second hen is eating a higher percentage but getting less total protein. This distinction matters enormously in hot weather, during stress, and in flocks of different body weights.

Daily protein requirements are best expressed as grams per hen per day rather than as a percentage of the diet. The National Research Council and most poultry nutritionists recommend 17 to 19 grams of crude protein per hen per day during peak production. This figure assumes a typical brown hen laying at 80 to 90 percent production with an average egg weight of 60 to 63 grams.

To translate this into a feed formulation, divide the daily protein requirement by the expected feed intake. If you expect hens to eat 110 grams per day and you want to deliver 18 grams of protein, the diet needs 16.4 percent crude protein. If feed intake drops to 95 grams, the diet needs 18.9 percent protein to deliver the same daily intake.

Protein Requirements by Stage of Lay

Protein needs are not constant through the laying cycle. They change as the hen ages, as egg size increases, and as feed intake shifts. A single feed formulation for the entire laying period is rarely optimal, and most commercial operations use two or three phase-feeding programs.

Pre-Lay and Onset of Lay

Pullets destined for the layer house need a pre-lay ration starting around 16 to 17 weeks of age. This ration typically contains 16 to 17 percent crude protein and is designed to prepare the digestive system for the higher calcium and protein levels of a layer diet. The pre-lay period is also when the hen builds medullary bone, a calcium reserve that supports egg shell formation.

The transition to a full layer ration should happen when the flock reaches 17 to 18 weeks of age or when the first egg appears, whichever comes first. Delaying this transition leaves hens without the protein and calcium they need for the first eggs, which often results in poor early shell quality and small egg size.

Peak Production

Peak production occurs between 25 and 35 weeks of age for most commercial layers. During this period, hens are laying at 90 percent or higher, egg size is still increasing, and the hen is under maximal metabolic demand. This is when protein needs are highest.

For peak production, provide 17 to 18 percent crude protein for brown hens and 16 to 17 percent for white hens. The difference between brown and white hens is not genetic superiority. Brown hens are heavier and eat more, so they need a slightly higher daily protein intake. In practice, most commercial brown layer diets run 17 to 18 percent protein and most white layer diets run 16 to 17 percent.

Methionine levels should be 0.40 to 0.45 percent of the diet during peak production, and lysine should be 0.75 to 0.85 percent. These levels ensure that the hen has enough of the limiting amino acids to maximize egg size and albumen quality.

Mid-Lay

From about 35 to 55 weeks, production gradually declines from peak, and egg size stabilizes. Feed intake typically increases slightly as the hen ages, so the percentage of protein in the diet can be reduced while maintaining the same daily protein intake.

A common mid-lay formulation is 16 to 16.5 percent crude protein for brown hens and 15 to 15.5 percent for white hens. Methionine can drop to 0.38 to 0.40 percent and lysine to 0.72 to 0.78 percent. The goal is to keep daily protein intake at 16 to 17 grams per hen while reducing feed cost.

Late Lay

After 55 weeks, egg production continues to decline, and the hen's protein needs drop further. Egg size may still increase slightly in some strains, but the overall trend is toward fewer and sometimes larger eggs. Late-lay rations typically run 15 to 15.5 percent crude protein for brown hens and 14.5 to 15 percent for white hens.

The main risk in late lay is not protein deficiency but protein excess. Overfeeding protein to older hens increases their water consumption, which leads to wet litter, foot problems, and higher ammonia levels in the house. Watch the flock for signs of excess protein, including loose droppings, increased water intake, and irritated feet.

Factors That Change Protein Requirements

Several environmental and management factors shift protein requirements beyond the basic stage-of-lay guidelines. Ignoring these factors is a common cause of unexplained production problems.

Temperature and Season

Temperature is the single biggest modifier of protein requirements. Hens eat to meet their energy needs, and energy needs change with temperature. In cold weather, hens eat more feed to stay warm. In hot weather, they eat less to avoid generating metabolic heat.

When temperatures rise above 80 degrees Fahrenheit, feed intake drops by roughly 1.5 percent for each degree above that threshold. A flock that eats 110 grams per day at 70 degrees might eat only 95 grams at 90 degrees. If the ration stays at 16 percent protein, daily protein intake drops from 17.6 grams to 15.2 grams, which is below the requirement for peak production.

To compensate, increase the protein concentration of the diet during hot weather. A ration formulated at 17.5 to 18.5 percent protein for summer feeding will deliver the same daily protein intake as a 16 percent ration in cooler weather. This is why commercial layer feeds often have summer and winter formulations.

Cold weather has the opposite effect. Feed intake rises, so the protein percentage can be lowered slightly to avoid overfeeding protein. A 15 to 15.5 percent protein ration may be perfectly adequate for a flock eating 120 grams per day in winter.

Body Weight and Strain

Heavier hens need more total protein each day than lighter hens because they have more body mass to maintain. A 2.2 kilogram brown hen needs about 10 percent more daily protein than a 1.7 kilogram white hen. This difference is built into the standard recommendations, but it becomes important if you are mixing strains in one house or if you are feeding a non-standard breed.

Heritage breeds and dual-purpose breeds often have different feed intake patterns than commercial hybrids. A heavier heritage breed may eat 120 to 130 grams of feed per day, which means a lower protein percentage in the feed can still meet daily needs. A light, high-production hybrid that eats only 95 grams per day needs a higher percentage protein.

Weigh a sample of hens every two weeks during the laying period. Hens that are losing weight between 25 and 40 weeks of age are almost certainly not getting enough protein, even if their egg production looks normal. Early weight loss is a leading indicator of a protein problem that will show up in egg numbers three to four weeks later.

Egg Size Targets

Egg size is directly influenced by protein and amino acid intake, particularly methionine and lysine. If you are producing for a market that pays a premium for large or extra-large eggs, you may need to push protein levels to the upper end of the recommended range.

To increase egg size, raise methionine to 0.44 to 0.46 percent and lysine to 0.82 to 0.86 percent during the period when egg size is still increasing, which is roughly 25 to 40 weeks. Beyond 40 weeks, egg size is largely determined by the hen's genetics and age, and additional protein will not produce larger eggs.

Conversely, if you are producing for a market that prefers medium eggs, you can hold protein at the lower end of the range. This saves feed cost and avoids the problem of too many large eggs in flocks that are prone to shell quality issues.

Feather Condition

Feathers are about 85 to 90 percent protein, and feather cover directly affects the hen's energy needs. A hen with good feather cover retains body heat more efficiently and needs less feed to maintain body temperature. A hen with poor feather cover loses heat faster and must eat more to stay warm.

If a flock has poor feather cover due to molting, pecking, or mechanical wear, increase dietary protein by 1 to 2 percentage points until new feather growth is complete. Feather regrowth is a significant protein drain, and hens that are re-feathering while laying will pull protein from egg production if the diet does not supply enough.

How to Calculate Protein Levels for Your Flock

You can calculate the right protein level for your flock with a simple formula that uses your expected feed intake and your target daily protein intake. This takes the guesswork out of feed formulation and lets you adjust for your specific conditions.

Step 1: Determine your target daily protein intake per hen. Use 18 grams per day for peak production in brown hens, 17 grams for white hens, and adjust down by 1 to 2 grams for late lay.

Step 2: Measure or estimate your flock's average daily feed intake. Weigh the feed given to a pen of known bird numbers over three to four days and divide by the number of birds.

Step 3: Divide the daily protein target by the feed intake and multiply by 100 to get the percentage protein needed in the diet.

For example, if your target is 18 grams per day and your hens eat 110 grams per day, the calculation is 18 divided by 110 times 100, which equals 16.4 percent. If your hens eat only 95 grams per day because of hot weather, the calculation is 18 divided by 95 times 100, which equals 18.9 percent.

Step 4: Check the amino acid levels in your feed. If you are buying a complete feed, the tag should list methionine and lysine. If you are mixing your own feed, use a feed formulation program or have your feed tested at a laboratory.

Step 5: Recalculate whenever feed intake changes by more than 5 grams per day. This happens with temperature swings, feed form changes, and health challenges.

Adjusting a Commercial Ration

If you are feeding a commercial complete feed, you cannot easily change the protein level. Your options are to switch to a feed with a different protein level, add a protein supplement, or adjust feeding management.

For small flocks, the simplest approach is to choose a commercial layer feed that matches your conditions. Most feed companies offer a regular layer feed at 16 percent protein and a high-protein layer feed at 17 to 18 percent. Use the high-protein feed during peak production and hot weather, and switch to the regular feed in late lay and cool weather.

For larger flocks, you can top-dress a protein supplement such as soybean meal, fish meal, or a commercial amino acid supplement. Add 1 to 2 percent soybean meal to raise the protein level by roughly 0.5 to 1 percentage point. Mix the supplement thoroughly into the feed to prevent selective feeding.

Mixing Your Own Layer Ration

If you mix your own feed, you have full control over protein levels, but you also take on full responsibility for accuracy. A typical corn-soybean meal layer ration at 16.5 percent protein might look like this:

Corn: 62 percent
Soybean meal (48 percent protein): 22 percent
Limestone or oyster shell: 8 percent
Dicalcium phosphate: 2 percent
Vegetable oil or fat: 2 percent
Vitamin and mineral premix: 3 percent
Salt: 0.4 percent
Methionine supplement: 0.15 percent

This formulation provides approximately 16.5 percent crude protein, 0.40 percent methionine, and 0.78 percent lysine. Adjust the soybean meal and corn proportions to change protein levels. Each 1 percent increase in soybean meal raises protein by about 0.5 percent and lowers corn by the same amount.

Always include a vitamin and mineral premix designed for layers. Protein is important, but calcium, phosphorus, vitamins, and trace minerals are equally critical for egg production and shell quality. A calcium level of 3.5 to 4.5 percent is essential for shell formation, and most of this calcium should come from large particle limestone or oyster shell.

Monitoring Protein Adequacy in Your Flock

You cannot tell if your protein levels are correct by looking at the feed tag. You have to watch the birds. The flock will show you within two to four weeks whether the protein supply is adequate.

Egg Production Records

Track daily egg production as a percentage of hens housed. A healthy commercial flock should reach peak production of 90 to 95 percent by 28 to 32 weeks of age. If production peaks below 90 percent or drops by more than 2 to 3 percent in a week without an obvious cause, protein deficiency is a prime suspect.

Keep in mind that production drops from protein deficiency are gradual, not sudden. A sudden drop of 10 percent or more within a day or two is more likely caused by disease, water restriction, or a feed contamination problem. A slow decline over two to three weeks points toward nutrition.

Egg Weight and Size

Weigh a sample of 20 to 30 eggs weekly. Egg weight should increase steadily from the start of lay until about 40 weeks of age, then stabilize. If egg weight plateaus early or starts to decline, the flock is likely short on methionine or lysine.

Egg size is one of the most sensitive indicators of amino acid adequacy. A methionine deficiency will reduce egg weight within 7 to 10 days, even before egg numbers drop. Check egg weight records against the breed standard for your flock's age.

Body Weight

Weigh 20 to 30 hens individually every two weeks. Hens should gain weight from the start of lay until about 30 weeks, then hold steady. Weight loss of more than 3 to 5 percent in a two-week period is a red flag for protein deficiency.

Body weight is the most reliable early indicator because the hen sacrifices body protein before she sacrifices egg production. By the time egg numbers drop, the hens have already lost significant body condition. Catch the problem early by weighing birds regularly.

Feather Condition

Score feather cover on a sample of birds every four weeks. Look at the back, breast, wings, and tail. A hen with good feather cover has smooth, intact plumage. A hen with poor cover shows bare skin or broken feathers.

Feather loss that is not caused by pecking or mites is a strong sign of protein deficiency. Feathers are constantly being replaced, and the hen needs dietary protein to do this. When protein is short, feather maintenance is one of the first things the hen sacrifices.

Egg Albumen Quality

Break a sample of eggs and measure the albumen height or use the Haugh unit method. Thick, firm albumen indicates adequate protein intake. Thin, watery albumen suggests the hen is not getting enough protein or amino acids.

Egg white is almost pure protein, and its quality reflects the amino acid supply at the time the egg was formed. Since egg formation takes about 24 hours, albumen quality responds quickly to dietary changes.

Common Protein Feeding Mistakes

Farmers make predictable mistakes when feeding protein to laying hens. Recognizing these patterns can save you from costly production losses.

Overfeeding Protein

The most common mistake is feeding too much protein. A 20 percent protein diet is not better than a 17 percent diet for laying hens. Excess protein is deaminated in the liver, and the nitrogen is excreted as uric acid. This wastes energy, increases water consumption, and produces wet litter and high ammonia levels.

Signs of overfeeding protein include loose droppings, increased water intake, ammonia smell in the house, and foot pad irritation. In severe cases, excess protein can cause kidney damage and increased mortality. If you see these signs, reduce protein to the recommended range before looking for other causes.

Underfeeding During Heat Stress

The opposite mistake is failing to adjust protein when temperatures rise. A flock eating 15 percent less feed in hot weather needs a higher protein percentage to maintain daily intake. Many farmers keep the same feed year-round and wonder why production drops in summer.

If you cannot switch to a higher protein feed, consider feeding during the cooler parts of the day and using management tools like fans and misters to encourage feed intake. The goal is to maintain daily protein intake of 17 to 18 grams per hen.

Ignoring Amino Acid Balance

Crude protein percentage alone does not guarantee adequate amino acids. A feed made with low-quality protein sources may test at 17 percent protein but be deficient in methionine. Always check the amino acid levels on the feed tag or have your feed tested.

If you are mixing your own feed, use a formulation program that balances for amino acids, not just crude protein. Many free and low-cost feed formulation tools are available from land-grant university extension services.

Switching Feeds Too Late

Pullets kept on grower feed past 18 weeks of age miss the protein and calcium they need for early egg production. The first few eggs are the most demanding nutritionally, and hens that start lay on an inadequate diet may never reach their full production potential.

Move pullets to a layer ration at 17 to 18 weeks or at the first egg, whichever comes first. Do not wait until production reaches 5 or 10 percent, as the hens will have already laid dozens of eggs on inadequate nutrition.

Sudden Feed Changes

Hens do not handle sudden feed changes well. Switching from a 15 percent protein feed to an 18 percent protein feed in one day can cause a temporary drop in feed intake and production. Make feed changes gradually over 5 to 7 days by blending the old and new feeds.

This is especially important when moving from grower to layer feed, when switching between summer and winter formulations, and when changing protein sources. A gradual transition gives the digestive system time to adapt.

Protein Sources for Layer Rations

The protein sources you choose affect both cost and performance. Understanding the strengths and weaknesses of each source helps you make better purchasing decisions.

Soybean Meal

Soybean meal is the standard protein source in poultry diets worldwide. It has a good amino acid profile, high digestibility, and consistent quality. Solvent-extracted soybean meal typically contains 44 to 48 percent protein.

Soybean meal is deficient in methionine, so most layer rations need supplemental methionine. It is also relatively low in calcium and phosphorus, which must be supplied by other ingredients.

Canola Meal

Canola meal contains 36 to 38 percent protein and is often cheaper than soybean meal. It has a different amino acid profile with lower lysine and methionine. Canola meal can replace up to half of the soybean meal in a layer ration without hurting performance, but it cannot be the sole protein source.

Canola meal contains glucosinolates, which can affect thyroid function at high inclusion rates. Keep canola meal below 10 percent of the total diet for layers.

Fish Meal

Fish meal is a high-quality protein source with excellent amino acid balance and high digestibility. It typically contains 60 to 65 percent protein and is rich in methionine and lysine. Fish meal is also a good source of calcium, phosphorus, and B vitamins.

The main drawbacks are cost and the risk of off-flavors in eggs if included at high levels. Keep fish meal at 2 to 5 percent of the diet and use a high-quality product to avoid contamination issues.

Meat and Bone Meal

Meat and bone meal contains 45 to 50 percent protein and is a good source of calcium and phosphorus. Its amino acid profile is less balanced than soybean meal, with lower methionine and higher lysine variability.

Meat and bone meal quality varies widely between processors. Use it at 3 to 5 percent of the diet and have it tested for protein, calcium, and phosphorus before use.

Synthetic Amino Acids

Methionine and lysine are available as synthetic supplements. DL-methionine and L-lysine HCl are the most common forms. These supplements allow you to balance amino acids precisely without overfeeding total protein.

Using synthetic amino acids is how commercial feed mills formulate low-protein diets that still meet amino acid requirements. A diet at 15 percent protein with added methionine and lysine can perform as well as a 17 percent protein diet without supplementation.

Peas and Field Beans

Peas and field beans are alternative protein sources for small flocks and organic production systems. They contain 20 to 25 percent protein and can replace part of the soybean meal in a ration. However, they are lower in methionine and contain anti-nutritional factors that limit inclusion rates.

If you are using peas or field beans, keep them below 15 percent of the diet and supplement with methionine. Have the feed tested for protein and amino acids, as these crops vary significantly by variety and growing conditions.

Troubleshooting Protein-Related Production Problems

When production drops, protein is not always the cause, but it should be high on your checklist. Work through these steps in order to identify the problem.

Step 1: Rule Out Feed Intake Problems

Before blaming the protein level, check how much feed the hens are actually eating. Weigh the feed given and the feed remaining over three to four days. Divide by the number of hens to get daily intake per hen.

If feed intake is below expected levels, the problem may be the feed itself. Check for mold, off-odors, or contamination. Check that feeders are working properly and that all hens have access to feed. Check water supply, as hens will not eat if they cannot drink.

Step 2: Verify the Feed Analysis

If feed intake is normal but production is dropping, have the feed tested. Send a sample to a commercial feed testing laboratory and request crude protein, methionine, lysine, calcium, and phosphorus analysis.

Feed mills make formulation errors, and ingredients vary in actual protein content. A load of corn that tests at 7 percent protein instead of 8.5 percent will dilute the entire ration. Testing is the only way to know what the birds are actually eating.

Step 3: Check for Disease

Protein deficiency and disease produce similar signs, including reduced production, weight loss, and poor feathering. If the feed analysis is correct and protein levels are adequate, consider infectious causes.

Marek's disease, infectious bronchitis, egg drop syndrome, and internal parasites can all cause production drops that look like nutritional problems. Check for other signs such as respiratory distress, diarrhea, or abnormal eggs. If you suspect disease, contact your veterinarian.

Step 4: Review Management Factors

Lighting, stocking density, and stress all affect how much protein hens need and how efficiently they use it. Hens need 14 to 16 hours of light per day to maintain production. Overcrowding reduces feed access and increases stress. Predator pressure, noise, and sudden changes in routine can all cause production dips.

If management factors are the problem, correcting them may restore production without any feed changes. But if protein was borderline, correcting management may reveal a protein deficiency that was previously masked.

Step 5: Make Adjustments and Monitor

Once you identify a protein problem, make adjustments and monitor the response. Egg weight should improve within 7 to 10 days, and egg numbers should respond within 2 to 3 weeks. Body weight will respond over 3 to 4 weeks.

Keep detailed records during the adjustment period. Track daily egg numbers, weekly egg weights, and biweekly body weights. This data tells you whether your changes are working and helps you fine-tune the ration.

When to Call a Veterinarian or Extension Agent

Most protein problems can be solved with feed adjustments, but some situations require professional help. Contact a veterinarian or extension agent in these circumstances:

Egg production drops by more than 10 percent within a few days, which suggests an infectious cause rather than a nutritional one.
Hens show signs of illness beyond reduced production, including respiratory distress, diarrhea, neurological signs, or sudden death.
You suspect a feed contamination issue, such as mycotoxins, pesticides, or heavy metals.
You cannot identify the cause of a production problem after working through the troubleshooting steps.
You need help formulating a custom ration or interpreting a feed analysis report.
You are considering a major change in feed ingredients or feeding program.

Your veterinarian can rule out infectious diseases and provide diagnostic testing. Your local extension agent can help with feed formulation, connect you to feed testing services, and provide regional recommendations based on local conditions.

When you call, have your records ready. Bring your feed tag, feed intake data, egg production records, egg weights, body weights, and a description of any signs you have observed. The more information you provide, the faster the professional can help you.

Record Keeping for Protein Management

Good record keeping is the foundation of effective protein management. You cannot make informed decisions without data. Set up a simple system that tracks the numbers that matter.

Daily Records

Record the following every day:

Number of eggs collected
Number of hens in the house
Feed given to the flock
Feed refused or discarded
Water intake if you have meters
House temperature and weather conditions
Any unusual observations

These daily records let you calculate feed intake per hen and spot problems early. A drop in feed intake of 5 grams per hen per day is often the first sign of trouble.

Weekly Records

Record the following every week:

Average egg weight from a sample of 20 to 30 eggs
Egg quality observations, including shell strength and albumen quality
Mortality and culling numbers
Feed analysis results if you are testing feed

Egg weight is the most sensitive indicator of amino acid adequacy. A drop of 1 to 2 grams in average egg weight is reason to check protein levels.

Biweekly Records

Record the following every two weeks:

Body weight of 20 to 30 individually identified hens
Feather condition scores
Body condition scores

Weigh the same hens each time so you can track individual changes. Hens that lose weight between 25 and 40 weeks are telling you that protein is inadequate.

Feed Batch Records

For each batch of feed you mix or purchase, record:

Date of mixing or delivery
Ingredient amounts or feed tag information
Calculated or guaranteed protein and amino acid levels
Feed analysis results if tested
Which flock received the feed and when

These records let you trace production problems back to specific feed batches. If production drops after a feed change, you can identify exactly which feed was involved.

Frequently Asked Questions

How much protein do laying hens need per day?

A laying hen needs 17 to 19 grams of crude protein per day during peak production. This drops to 15 to 16 grams per day in late lay. The percentage of protein in the feed depends on how much feed the hen eats, which varies with temperature, body weight, and production level. A hen eating 110 grams of feed per day needs a 16 to 17 percent protein ration, while a hen eating only 95 grams per day needs 18 to 19 percent protein to get the same daily intake.

What happens if laying hens get too much protein?

Excess protein is deaminated in the liver and the nitrogen is excreted as uric acid. This wastes energy, increases water consumption, and produces wet litter and higher ammonia levels in the house. Signs of overfeeding protein include loose droppings, increased water intake, ammonia smell, and foot pad irritation. In severe cases, excess protein can cause kidney damage. Do not feed above 19 percent crude protein to laying hens without a specific reason.

What are the signs of protein deficiency in laying hens?

The first signs are reduced egg size and feather loss. Within 7 to 10 days of a methionine deficiency, egg weight drops. Within 2 to 3 weeks, egg production declines and hens lose body weight. The hen sacrifices body protein before she sacrifices egg production, so weight loss is an early indicator. Thin, watery egg albumen is another sign. Check body weight and egg weight records if you suspect protein deficiency.

Do brown hens need more protein than white hens?

Brown hens generally need slightly more protein per day than white hens because they are heavier and have higher maintenance requirements. A brown hen needs about 18 grams of crude protein per day at peak production, while a white hen needs about 17 grams. In percentage terms, brown layer rations typically run 17 to 18 percent protein and white layer rations run 16 to 17 percent. The difference is small but worth accounting for in feed formulation.

Can I feed a higher protein feed during hot weather?

Yes, and you often must. Hens eat less in hot weather, so the protein percentage in the feed must increase to maintain daily protein intake. When temperatures rise above 80 degrees Fahrenheit, feed intake drops by about 1.5 percent per degree. A flock eating 95 grams of feed per day in hot weather needs an 18 to 19 percent protein ration to get the same protein as a 16 percent ration in cooler weather.

How do I increase egg size with protein?

Egg size responds to methionine and lysine intake during the period when egg size is still increasing, roughly 25 to 40 weeks of age. Raise methionine to 0.44 to 0.46 percent of the diet and lysine to 0.82 to 0.86 percent. Beyond 40 weeks, egg size is largely determined by genetics and age, and additional protein will not produce larger eggs. If egg size is below target, check both the protein level and the amino acid balance of the feed.

What is the best protein source for laying hens?

Soybean meal is the standard protein source because it has a good amino acid profile and consistent quality. Most layer rations combine soybean meal with supplemental methionine. Fish meal is a high-quality source but is expensive and can cause off-flavors in eggs at high levels. Canola meal and meat and bone meal can replace part of the soybean meal but have less balanced amino acid profiles. The best choice depends on cost, availability, and your production goals.

When should I switch pullets to a layer ration?

Switch pullets to a layer ration at 17 to 18 weeks of age or when the first egg appears, whichever comes first. Use a pre-lay ration at 16 to 17 percent protein starting around 16 weeks to prepare the digestive system. Delaying the switch to a full layer ration leaves hens without the protein and calcium they need for early egg production, which can reduce peak production and cause shell quality problems.

Related Farming Guides

The following guides provide additional information on poultry nutrition, flock management, and egg production. They will be listed here when available.

Related Clinical & Scientific Guides

References

FAO Poultry Production: https://www.fao.org/poultry-production-products/en/
USDA APHIS Poultry Health: https://www.aphis.usda.gov/livestock-poultry-disease/avian
WOAH Avian Influenza: https://www.woah.org/en/disease/avian-influenza/
FAO Animal Production and Health: https://www.fao.org/animal-production/en/
WOAH (World Organisation for Animal Health): https://www.woah.org/en/home/

This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.