Feeding Chickens at Different Ages

Chickens at different stages of development require different feed formulations.
Chickens at different stages of development require different feed formulations. Commercially prepared rations are a nutritionally balanced food source; poultry nutritionists formulate feed to ensure that chickens get all the nutrition they need daily, therefore, anything that is added to the diet dilutes the nutrient balance they should be getting daily. Even healthy snacks should only be given in moderation so as not to tip the balance, or scale, too far in any direction.

Chickens at different stages of development require different feed formulations.I strongly caution against dabbling in assembling homemade feed blends. Imprecise calculations and the wrong ingredients can affect growth in young chickens, egg production in layers and result in negative, long-term health consequences. “Mixing rations is the most complex aspect of poultry management and isn’t something you should undertake if you’re just starting out.

Ration formulation requires:

  • availability of appropriate feedstuffs
  • analysis of feedstuff composition
  • knowledge of the nutritional needs of chickens
  • ability to mix feed in quantity your flock will use within four weeks.”1  Storey’s Guide to Raising Chickens, Damerow

“The adventure of homemade chicken feed mixing isn’t for the casual flock keeper, though. You need a solid knowledge of poultry nutrition to balance a ration properly and avoid nutritional deficiencies. Feeding unconventional feed ingredients does carry some risk because unexpected problems may happen, such as digestive upset, toxicities, or spoilage.”2 Dr. Julie Gauthier, DVM, MPH, Dipl.ACVPM

The following is intended as a general guideline for feeding commercial ration to laying breeds. The availability of certain feed varies by geographic location, therefore, the manufacturer’s recommendations should always be followed.

Day-old chicks through 8 weeks old require starter feed containing 20% protein. Starter feed contains the highest percentage of protein a layer will ever consume, which makes sense given their astronomical rate of growth in the first few months of life.

STARTER FEED, Day 1 to 8 weeks (Chicks) 

Day-old chicks through 8 weeks old require starter feed, aka starter crumbles, containing 20% protein. Starter feed contains the highest percentage of protein a layer will ever consume, which makes sense given their astronomical rate of growth in the first few months of life.

Starter feed can be purchased in both medicated and unmedicated varieties. Medicated feed contains amprolium, which protects chicks from the progression of coccidiosis, a common and deadly intestinal disease that is spread in fecal matter. Chicks that have received the coccidiosis vaccine should not be fed medicated starter, as the amprolium will render the vaccine useless and the chicks vulnerable to the disease. When purchasing ‘vaccinated’ chicks, it’s important to know which vaccines they received.

Starter feed can be purchased in both medicated and unmedicated varieties.When conditions become overcrowded, filthy, wet and warm from the heat source, coccidiosis can thrive with deadly consequences. These types of unhealthy conditions are significantly less likely to occur with pet chickens than they are with commercial poultry operations. Chickens build up a natural immunity to the organisms that cause coccidiosis with or without medicated starter. Allowing chicks to build up an immunity in clean, dry conditions will serve them well when they are ready to head out to the big kid coop and medicated feed helps keep parasite populations that cause coccidiosis in check while they build immunity to them
Most new chicken-keepers wonder at what age a chick can be given treats, but there is no specific age at which it is appropriate. Chicks are tiny and treats will replace a percentage of the nutrition in starter ration that their rapidly-growing bodies require. Common sense should be the guide; small, healthy treats on occasion.Most new chicken-keepers wonder at what age a chick can be given treats, but there is no specific age at which it is appropriate. Chicks are tiny and treats will replace a percentage of the nutrition in starter ration that their rapidly-growing bodies require. Common sense should be the guide; small, healthy treats on occasion.

I do not consider this pumpkin a small treat, they were only allowed to eat it for a short period of time.
I do not consider this pumpkin a small treat, they were only allowed to eat it for a short period of time

The term grit describes hard materials hard materials such as sand, dirt or small stones that aid in digestion.

GRIT

While starter feed and layer crumbles and pellets needs no help being digested, but treats, grains and other fibrous foods require grit to help digest them. The term grit describes hard materials such as sand, dirt or small stones that aid in digestion. Since chickens have no teeth, fibrous foods are ground with grit in the gizzard, which is a muscle in the digestive tract. Chickens foraging outside will naturally pick up bits of grit from the ground, those that do not forage outside must have grit supplied to them.With its higher protein content, starter ration can rush a young pullet's developing body into egg-laying before it's ready. Adolescent chickens (I call them teenagers) should be provided with grower ration containing 16-18% protein, slightly less than starter.

GROWER FEED, 8 weeks to 18 weeks (Teenagers)

With its higher protein content, starter ration can rush a young pullet’s developing body into egg-laying before it’s ready. Adolescent chickens (I call them teenagers) should be provided with grower ration containing 16-18% protein, slightly less than starter.
Layer feed is available in mash, crumble or pellet forms, all of which describe the size of the feed. Mash is the smallest, pellets, the largest.Layer feed should not be fed to chickens younger than 18 weeks unless they have begun egg-laying because it contains calcium that can permanently damage the kidneys, cause kidney stones, reduce lifetime egg production and shorten a bird’s lifespan. Again, grit should be made available to teenagers that do not foraging outside who consume treats.

Layer feed should not be fed to chickens younger than 18 weeks unless they have begun egg-laying because it contains calcium that can permanently damage the kidneys, cause kidney stones, reduce lifetime egg production and shorten a bird's lifespan.
Click here for DIY instructions for this feeder

Layer pellets for laying hens

LAYER FEED, 18 weeks and older (The Big Girls)

Layer feed is available in mash, crumble and pellet forms, all of which describe the size of the feed. Mash is the smallest and pellets, the largest. Layer feed generally contains 16-18% protein and has added calcium, which is necessary for eggshell production.  Laying hens should be fed layer ration by 18 weeks old when their first egg is laid, whichever comes first.

While layer feed contains some calcium, an additional source of calcium such as crushed oyster shells should be made available to laying hens in a separate dish, apart from the feed, NOT in the feed.

SUPPLEMENTAL CALCIUM

While layer feed contains some calcium, an additional source of calcium such as crushed oyster shells should be made available to laying hens in a separate dish, apart from the feed, NOT in the feed. All laying hens have different calcium requirements and will consume as much oyster shell as they need. Adding clean, dried eggshells to the oyster shell dish is fine, but eggshells alone are not an adequate calcium source for laying hens.3
Hens deprived of adequate amounts of calcium will utilize the calcium stored within their own bones to produce eggshells, which is unhealthy for them.Hens deprived of adequate amounts of calcium will utilize the calcium stored within their own bones to produce eggshells, which is unhealthy for them.Commercial layer feed provides all of the daily nutritional elements a chicken requires. Providing snacks, treats or table scraps in addition to feed interferes with that balanced diet to a degree, depending on the type of treat and amount consumed.

LIMIT TREATS

Commercial layer feed provides all of the daily nutritional elements a chicken requires. Providing snacks, treats or table scraps in addition to feed interferes with that balanced diet to a degree, depending on the type of treat and amount consumed. Limiting snacks and treats, even healthy choices such as mealworms, homemade flock block substitute and pumpkin/pumpkin seeds, ensures that flock members are getting everything they need and avoids problems such as obesity, feather picking, egg binding and reduced egg production.
Chicken scratch is NOT chicken feed. The contents of scratch varies by country and region, but it consists primarily of cracked corn and any number of other grains.

SCRATCH

Chicken scratch is NOT chicken feed. The contents of scratch vary, but it consists primarily of cracked corn and any number of other grains. It’s a source of energy (think: carbs) but is not a good source of vitamins, minerals or protein. “Scratch should be fed sparingly, if at all.” 2 In cold weather, chickens expend extra energy to keep warm and a small amount of scratch just before dusk is a decent source of energy during the coldest nights, but too much can contribute to obesity and obesity-related deaths. Brooding hens will also benefit from the extra calories in scratch.
Chicken scratch is NOT chicken feed. The contents of scratch varies by country and region, but it consists primarily of cracked corn and any number of other grains. It's a source of energy (think: carbs) but is not a good source of vitamins, minerals or protein.

FEEDING DIFFERENT AGE GROUPS TOGETHER

Given the power and force of chicken math, chickens of mixed age groups often occupy the same living space at any given time, which raises the question of how to feed each properly. This situation isn’t ideal, but it’s not unique either.  Providing unmedicated starter/grower to a flock of mixed age birds with calcium available free-choice (in a separate dish) is the best solution. The additional protein in the starter/grower ration won’t hurt the older birds, but the calcium in layer feed can damage the kidneys of growing birds.
A free-feed dining option is the most common in backyard flocks, one in which chickens eat in small increments at their leisure throughout the day.

FREE FEEDING vs. RESTRICTED FEEDING

A free-feed dining option is the best and most common in backyard flocks, one in which chickens eat in small increments at their leisure throughout the day. Chickens have a unique digestive system that can accommodate only a small amount of food at a time in their crops.  The feeder supplied to these chickens need accommodate only a few birds at a time. Alternatively, with a restricted feeding schedule, chickens are fed at specific intervals during the day, which requires all birds to have access to a portion of a feeder simultaneously so that birds lower in the pecking order are not deprived of food. Restricted feeding generally requires the use of several feeders even in a small flock and should not be employed without a good reason for doing so and a clear understanding of the purpose of restricted feeding.
White Crested Blue Polish chick.Kathy Shea Mormino, The Chicken Chick®

Sources and further reading

1 Storey’s Guide to Raising Chickens, Damerow, Gail. Storey Publishing, 1995, pg. 49.
2 The Chicken Encyclopedia, Damerow, Gail. Storey Publishing, 2012. pg. 235
3 *Gail Damerow, Backyard Poultry Magazine Volume 9, Number 3 June/July, 2014

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Rosie Wright
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Rosie Wright

I heard about fermenting the chicken feed, but I am not sure if it is good for my chickens what is your advise??

Rosie Wright
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Rosie Wright

What about fermenting the chicken feed???

Firefly Farm
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Firefly Farm

I’m in Mason Michigan and my chickens (38 in all) are down to laying about 3-4 eggs per day. This isn’t unusual for this time of year.

Mary Cosner
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Mary Cosner

Thank you for yet another helpful article. I am thinking of letting a broody hen raise some chicks with the big flock and was worried about how to feed everyone correctly. As usual, you have the answer. Thanks again!

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