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Why Is My Chicken Laying Soft-Shell Eggs?

Reviewed by Editorial Team · · 2 min read

Possible Causes #

  • Calcium deficiency — diet too low in calcium or oyster shell not freely available.
  • Vitamin D3 deficiency — birds with little outdoor light can’t absorb calcium well.
  • Heat stress — hens pant in heat, which disrupts the chemistry that hardens shells.
  • Young hens — pullets just starting to lay sometimes produce soft or oddly shaped first eggs.
  • Older hens — shell quality often declines as a hen ages.
  • Disease — infectious bronchitis and a few other illnesses affect shell quality.
  • Sudden stress — a predator scare or sudden change can disrupt the laying cycle.

What To Check Today #

  • Is oyster shell offered free-choice in a separate dish (not mixed into feed)?
  • Is the layer feed labeled for laying hens (typically 16–18% protein, ~3.5–4.5% calcium)?
  • Are the birds getting outside or under a window for sunlight?
  • Has the weather been hot recently?
  • Is the soft egg coming from one hen or several?

What You Can Do Safely #

  • Offer oyster shell free-choice in a dedicated container.
  • Confirm feed is a layer ration, not grower or all-flock without supplementation.
  • Provide shade and cool water in hot weather.
  • Reduce stressors (loose dogs, new birds, disrupted routine).

When To Contact A Poultry Vet #

Contact a poultry vet or local extension office if:

  • Multiple hens are laying soft-shell or shell-less eggs.
  • A hen seems weak, hunched, or off feed in addition to laying soft eggs.
  • The hen has stopped laying entirely and is straining (possible egg binding — this can be an emergency).

Prevention Tips #

  • Keep oyster shell available year-round, separate from feed.
  • Provide ventilation and shade in summer.
  • Plan ahead for older hens — shell decline is normal with age.

FAQ

Is one soft-shell egg an emergency?

No. A single soft-shell egg from a hen who normally lays fine — especially a new layer or during a hot week — is usually nothing to worry about. Keep watching.

Should I crush eggshells and feed them back?

You can, but oyster shell is more reliable. Eggshells must be baked and crushed; oyster shell comes ready and dissolves more slowly, giving hens a steady calcium source.

Can I just mix calcium into the feed?

Avoid that. Roosters, chicks, and non-laying birds shouldn't eat high-calcium feed. Offer it separately and let layers self-regulate.

Sources

Reviewed by Editorial Team

Backyard Flock & Garden publishes practical, source-backed guidance for backyard chicken keepers and gardeners. See our editorial guidelines.

Last reviewed .