If you raise turkeys long enough, eventually one of them will do something that sends you straight to the internet looking for answers.
For us, it has been one of our turkey hens who has a particularly strange laying habit: she frequently lays two eggs at nearly the same time.
Even more interesting, the eggs aren’t the same. The first turkey egg has a perfectly normal, hard shell, while the second egg has a soft, thin, rubbery, or poorly formed shell.
At first glance, this seems like an obvious calcium problem. After all, soft-shelled eggs are commonly associated with calcium deficiencies in poultry.
But when the same turkey consistently produces one perfectly shelled egg followed by a soft-shelled egg, something else may be happening.
The problem may have much more to do with timing inside the turkey’s reproductive system than with the amount of calcium she’s eating.
Why Would a Turkey Lay Two Eggs at Once?
A turkey hen’s reproductive system is designed to produce eggs sequentially.
Normally, the process looks something like this:
- The ovary releases a yolk.
- The yolk enters the oviduct.
- Albumen, or egg white, is added.
- The membranes surrounding the egg develop.
- The egg enters the shell gland, also called the uterus.
- Calcium is deposited around the egg to create the hard shell.
- The completed egg is laid.
Then the process begins again.
Producing that shell takes time. A poultry egg spends many hours in the shell gland while calcium carbonate is deposited around it.
But occasionally, the reproductive system doesn’t follow its usual schedule.
Two Yolks May Be Released Too Close Together
If a turkey hen ovulates again before the previous egg has completely finished its journey through the reproductive tract, two developing eggs can end up moving through the oviduct unusually close together.
That can create the exact situation we’re seeing.
The first egg gets the normal amount of time in the shell gland and develops a strong shell.
The second egg follows too closely behind.
Instead of remaining in the shell gland long enough for a complete shell to form, it may be expelled early. The result can be an egg with a:
- Very thin shell
- Soft or rubbery shell
- Partially calcified shell
- Wrinkled or otherwise abnormal shell
- Membrane but little or no hard shell
In other words, the turkey may have plenty of calcium available—the second egg simply didn’t have enough time to use it.
Does a Soft-Shelled Turkey Egg Always Mean Calcium Deficiency?
No.
This is one of the important lessons we’ve learned from keeping poultry: an abnormal eggshell doesn’t automatically mean you need to add more calcium.
Calcium deficiency certainly can cause thin or soft eggshells. Poor nutrition, improper feed, vitamin D deficiency, disease, stress, age, and reproductive disorders can also affect shell quality.
But context matters.
In our turkey’s case, she is capable of producing a beautifully shelled egg.
Then she produces another egg very shortly afterward that doesn’t have a proper shell.
That pattern suggests that the problem could be associated with how quickly the eggs are passing through her reproductive tract rather than simply an inability to produce a shell.
Why Doesn’t the Second Turkey Egg Have Enough Time to Form a Shell?
Think of the shell gland as the final major production station before an egg is laid.
The egg needs to remain there long enough for calcium carbonate to be deposited around the membranes and form a strong shell.
If another developing egg is moving through the reproductive system too closely behind the first, the normal schedule can be disrupted.
The second egg may essentially be pushed through the process too quickly.
That’s why the sequence itself is an important clue:
Egg #1: Normal, hard shell
Egg #2: Thin, soft, rubbery, or incomplete shell
If both eggs consistently had poor shells, nutrition or calcium availability would move higher on our list of possible causes.
But when one is completely normal and the next is abnormal, reproductive timing becomes particularly interesting.
Should You Give a Turkey More Calcium for Soft-Shelled Eggs?
Before automatically adding large amounts of calcium, look at the turkey’s entire diet.
Our turkeys receive a complete poultry/game-bird ration appropriate for their stage of life, and we also make oyster shell available free-choice so laying hens can consume additional calcium when they need it.
Free-choice oyster shell is different from forcing additional calcium into every bird’s diet. The hens can regulate their intake to some extent based on their needs.
If a turkey is already receiving an appropriate diet and has access to supplemental calcium, continually adding more calcium may not solve an egg-production timing problem.
Nutrition still deserves attention, though.
For laying turkeys, make sure they have:
- A nutritionally complete feed appropriate for adult turkeys
- Constant access to clean water
- Free-choice oyster shell or another appropriate calcium source
- Adequate vitamin D to support calcium absorption
- A diet that isn’t being excessively diluted with scratch grains, treats, or table scraps
Treats are fine in moderation, but a turkey filling up on supplemental foods may consume less nutritionally balanced feed.
Can Young Turkeys Lay Strange Eggs?
Absolutely.
Just as young chicken pullets can produce tiny eggs, double-yolk eggs, shell-less eggs, or oddly shaped eggs when they first begin laying, young turkey hens can experience reproductive irregularities as their systems settle into a normal rhythm.
Occasional strange eggs aren’t necessarily cause for alarm.
However, a turkey that repeatedly produces two eggs very close together is worth watching, particularly if one of those eggs is consistently soft-shelled.
Is It Dangerous for a Turkey to Lay Soft-Shelled Eggs?
It can become a concern.
A hard-shelled egg has a defined shape and relatively smooth surface that helps it move through the reproductive tract.
A soft or shell-less egg is different.
Because it can compress and deform, it may be more difficult for the hen to pass. Repeated reproductive abnormalities can also warrant closer observation because laying birds can experience problems such as retained eggs or other reproductive tract disorders.
That doesn’t mean every soft-shelled egg is an emergency.
It does mean we pay closer attention to the turkey producing them.
Warning Signs to Watch for in a Laying Turkey
If your turkey is producing abnormal eggs, watch her closely for changes in her normal behavior.
We would become much more concerned if we noticed:
- Repeated straining
- Tail pumping
- Sitting or squatting unusually
- A penguin-like upright posture
- Difficulty walking
- A swollen or distended abdomen
- Loss of appetite
- Lethargy
- Spending excessive time in the nesting area without producing an egg
- Discharge from the vent
- Difficulty passing an egg
- Suddenly stopping egg production along with signs of illness
Those symptoms can indicate that something more significant is happening and would justify contacting a poultry-experienced veterinarian.
What We’re Doing With Our Turkey
For now, we’re taking the observational approach.
Because our hen continues producing a normal, hard-shelled egg in addition to the abnormal one, we’re not simply dumping additional calcium supplements into her diet.
Instead, we’re making sure she has:
- A complete, nutritionally appropriate diet
- Free-choice oyster shell
- Plenty of clean water
- Minimal dietary disruption
- A comfortable nesting environment
Most importantly, we’re watching her behavior and monitoring her eggs.
If the pattern changes—or if she begins showing any signs of discomfort or illness—we’ll reassess.
That’s one of the realities of raising poultry. You quickly learn what is “normal” for the species, but you also learn what is normal for each individual animal.
And sometimes one turkey decides to write her own rulebook.
The Bottom Line: Why Does My Turkey Lay a Normal Egg and a Soft-Shelled Egg Together?
If your turkey lays two eggs very close together and the first has a normal shell while the second is soft-shelled, calcium deficiency isn’t the only possible explanation.
The turkey may be ovulating again too quickly, causing two developing eggs to travel through the reproductive tract unusually close together.
The first egg receives enough time in the shell gland to develop normally.
The second may not.
As a result, she can produce one beautiful, completely normal turkey egg followed by a soft, thin, rubbery, or incompletely shelled egg.
Make sure she’s receiving proper nutrition and has access to calcium, but don’t assume that continually adding more calcium will solve the problem.
Sometimes the issue isn’t how much calcium is available.
It’s how much time the egg has to build its shell.
And as with so many things on the homestead, careful observation can tell you an incredible amount about what’s happening with your animals.
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