Egg Shells sits in the maybe category. It is not automatically dangerous, but details matter.

Verdict: Usually yes, with caveats. Sharp shell fragments and bacterial contamination are practical risks.

Safe prep first

If used at all, shells should be cleaned, baked dry, and finely ground to powder.

  • Serve it plain, with no garlic, onion, sweeteners, or heavy seasoning.
  • Start small, then wait before offering more.
  • Keep treats under about 10% of daily calories.

Portion and limits

Very small sprinkle amounts only.

Source check: VCA generally prefers complete diets over homemade calcium add-ons without veterinary guidance. Source