For many backyard chicken owners, waiting for that first egg can feel exciting and a little nerve-wracking. You watch your pullets grow from fluffy chicks into awkward teenagers and start wondering, “when will the eggs finally arrive?”
The truth is a lot is happening inside a hen’s body before that first egg ever appears in the nesting box. From changes in hormone levels to building calcium reserves, the weeks leading up to lay are some of the most important in their life.
Understanding what is going on during this pre-lay period can help backyard flock owners better support their birds and set them up for long-term success.
Why the pre-lay period matters when waiting for the first egg
Before a hen starts producing eggs, her body must prepare for a process that will require a tremendous amount of nutrients and energy. Once hens start laying, they begin using significant amounts of calcium and energy. Specifically, eggshells are made primarily of calcium, and hens pull much of that calcium from their own bones. During the weeks leading up to sexual maturity, they develop specialized compartments within some of their bones referred to as medullary bones, which act as a calcium reserve for eggshell production. Providing extra calcium during the pre-lay period is crucial for the proper development of these bones.
If a pullet does not have adequate calcium stores in her medullary bones before laying begins, she may struggle to maintain shell quality over time. Not only can this result in thin shells, inconsistent laying and reduced production, but over the course of her life, can cause her bones to become brittle and predisposed to injury (osteoporosis).
This is why nutrition before the first egg matters just as much as during production.
Nutritional changes before the first egg
One of the biggest nutritional shifts before the start of lay is calcium intake. Starter and grower feeds contain around the 1% calcium requirement for the proper growth and development of young birds. However, an adult hen’s need for calcium can jump to more than 4% during full egg production. Therefore, switching to a higher calcium layer diet, like Home Fresh Extra Egg Layer, is crucial to not only support eggshell formation, but also for the sustained health of the hens over their lifespan.
Backyard flock owners should begin transitioning pullets to a layer feed about two weeks before they are expected to start laying. A general guide is to make this switch when they are 16 to 18 weeks old. For most backyard flocks, the transition would be from a starter feed to a layer feed. Some flock owners may find it helpful to mix the feeds together during the transition period, especially if they are switching from a crumble to a pelleted feed.
In addition, providing a separate feeder with supplemental calcium, such as oyster shells, can also help support hens during the transition period. Hens are surprisingly good at regulating their calcium intake and will seek out additional calcium as needed (if available). This may be especially helpful if you are unsure of the age of your pullets or when the first egg is expected.
Why daylight has more influence on the first egg than people realize
One of the most significant triggers for egg production is light exposure. As pullets mature, increasing daylight stimulates a cascade of hormonal changes that activate the reproductive system. Chickens naturally respond to seasonal light patterns. Backyard flock owners may notice more natural fluctuations depending on the season and available lighting (natural daylight or artificial lighting). Typically, around 12 hours of light is enough to stimulate consistent laying in most hens. This is why egg production often increases during longer spring and summer days.
Stress can delay the first egg
Pullets generally begin laying around 18 to 20 weeks of age, depending on the breed. Production breeds (like Leghorns or Rhode Island Reds) often mature earlier than ornamental breeds (Polish or Silkies), which tend to lay less heavily and start later in life. However, even if a hen is physically mature, stressful conditions can delay egg production. While stress factors such as weather patterns are not in our control, we can focus efforts on making the flock as comfortable as possible.
Major changes to the coop environment during the pre-lay stage can make pullets uneasy and hesitant to begin laying. Therefore, if flock owners are planning to move birds, rearrange the coop or introduce nesting boxes, it is best to do so before pullets reach 16 weeks of age. Introducing new birds to the flock will also disrupt the social hierarchy and cause stress. Give birds at least a 2-week period without major environmental changes to settle in before laying begins to help reduce stress and encourage a smoother transition into production.
Signs your hen is getting ready to lay
As pullets approach maturity, backyard flock owners may notice several behavioral and physical changes. One of the first signs is increased curiosity around nesting areas. Hens may begin exploring nesting boxes or searching for quiet, protected spaces.
Another common behavior is known as ‘submissive squatting’. Hens may crouch down and slightly lift their wings when approached, which can be a strong sign they are nearing sexual maturity and may begin laying soon.
Physical appearance changes can also offer clues. Combs and wattles often become larger and brighter red as hormone levels increase.
Your hen’s body condition matters when preparing to lay
Along with proper calcium intake, maintaining healthy body condition is important before laying begins.
Inadequate feed intake can slow growth and development. If conditions are excessively hot, your flock may reduce their feed intake. Other factors such as competition for feed may cause less-dominant hens to limit feed intake. If you notice any hens that are runty or significantly smaller than their flock mates (outside of normal breed/size differences), there may be an issue at hand. Pullets that are underweight may be delayed in reaching maturity because their bodies are not physically prepared for the demands of egg production.
Egg laying might be inconsistent at first
One misconception many first-time chicken owners have is expecting immediate consistency after the first egg appears. Egg production does not immediately go from zero to full production overnight. It can take several weeks for hens to settle into a regular laying rhythm.
Some birds may lay earlier than others, especially in mixed flocks with different breeds and personalities. More dominant hens may even reach maturity faster simply because they have easier access to feed.
For backyard flock owners, the key is to create a stable environment, provide balanced nutrition and to give pullets time to mature naturally.
The weeks before the first egg may not seem exciting from the outside, but inside the hen, an incredible amount of preparation is already underway.
