Can Dogs Eat Eggshells? A Pet Parent’s Guide to Safety, Benefits, and Risks

You’re standing at the kitchen counter, cracking eggs for your morning omelet, when your dog trots over—tail wagging, nose twitching—eyeing the discarded eggshells. “Can they have a little?” you wonder. It’s a common question: eggshells are a kitchen staple, and we hate to waste anything that might be good for our pups. But are eggshells safe for dogs? Do they offer hidden benefits, or are they a risky snack?

In short: Yes, dogs can eat eggshells—but only if they’re prepared safely and served in moderation. Eggshells are packed with nutrients like calcium, which supports your dog’s bones and teeth, but they also come with potential risks, from choking hazards to nutrient imbalances. Let’s dive into everything you need to know to decide if eggshells deserve a spot in your dog’s bowl.

Table of Contents

1. Can Dogs Eat Eggshells? The Short Answer
2. The Benefits of Eggshells for Dogs: What’s in It for Them?
3. The Risks: Why Eggshells Might Not Be Right for Every Dog
4. How to Safely Feed Eggshells to Your Dog: A Step-by-Step Guide
5. Healthier Alternatives to Eggshells for Extra Nutrition
6. FAQ: Your Eggshell Questions Answered
7. Conclusion: Moderation is Key
8. References

Can Dogs Eat Eggshells? The Short Answer

Yes, dogs can eat eggshells—but not straight from the carton. Raw, uncrushed eggshells pose choking risks, and they may harbor bacteria like salmonella. However, when cleaned, cooked, and crushed into a fine powder, eggshells can be a low-cost, natural source of calcium for your dog.

Think of eggshells as a “supplement,” not a main meal. They shouldn’t replace a balanced diet, but they can boost your pup’s nutrient intake when served mindfully. Always consult your vet first, especially if your dog has health conditions like kidney disease or a history of gastrointestinal issues.

The Benefits of Eggshells for Dogs: What’s in It for Them?

Eggshells are more than just waste—they’re a nutritional powerhouse, thanks to their unique composition. Here’s how they might benefit your dog:

1. Calcium: The Star Nutrient

Eggshells are 95% calcium carbonate, a form of calcium that’s easily absorbed by dogs (and humans!). Calcium is critical for:

• Bone and teeth health: It strengthens bones, supports growth in puppies, and helps prevent osteoporosis in senior dogs.
• Muscle function: Calcium helps muscles contract and relax, including the heart.
• Nerve transmission: It ensures messages travel properly between the brain and body.

A 2019 study in the Journal of Animal Physiology and Animal Nutrition notes that eggshell calcium is as effective as commercial calcium supplements for dogs, making it a budget-friendly option.

2. Trace Minerals for Overall Health

While calcium steals the spotlight, eggshells also contain small amounts of:

• Magnesium: Supports bone health and energy production.
• Potassium: Regulates fluid balance and heart health (found mostly in the thin, white membrane lining the shell).
• Phosphorus: Works with calcium to build strong bones (though eggshells have less phosphorus than calcium, so balance is key).

3. A Tiny Boost of Fiber

The membrane (the thin, papery layer inside the shell) has a smidge of fiber, which can support digestive health in small doses. It’s not enough to replace veggies or other fiber sources, but every little bit helps!

The Risks: Why Eggshells Might Not Be Right for Every Dog

Eggshells aren’t without risks. Here’s what to watch out for:

1. Choking or Blockage Hazard

Whole or coarsely crushed eggshells are sharp and rigid. A small dog could choke on a piece, and even larger dogs might suffer an intestinal blockage if shell fragments get stuck. Always crush shells into a fine powder to eliminate this risk.

2. Gastrointestinal Upset

Eggshells are hard and can irritate your dog’s stomach or intestines if fed in large quantities or without proper crushing. Symptoms like vomiting, diarrhea, or constipation may occur if your pup eats too much too fast.

3. Salmonella Contamination

Raw eggshells (and raw eggs) can carry salmonella, a bacteria that causes food poisoning in dogs and humans. While healthy dogs often fight off salmonella without issue, puppies, seniors, or immunocompromised dogs are at higher risk. Cooking eggshells kills bacteria, making them safer.

4. Calcium Overload

Too much calcium is just as bad as too little. Excess calcium can lead to:

• Bladder or kidney stones: High calcium levels increase the risk of mineral deposits in the urinary tract.
• Skeletal issues in puppies: Large-breed puppies fed extra calcium may develop hip dysplasia or osteochondrosis (a joint disorder).
• Kidney damage: Dogs with kidney disease can’t filter excess calcium, leading to toxicity.

How to Safely Feed Eggshells to Your Dog: A Step-by-Step Guide

If you want to try eggshells, follow these steps to keep your pup safe:

Step 1: Clean the Shells

Rinse eggshells thoroughly under warm water to remove any egg residue. Even a tiny bit of leftover egg can attract bacteria.

Step 2: Cook the Shells

Bake the shells on a baking sheet at 250°F (120°C) for 10–15 minutes. This kills salmonella and dries out the shells, making them easier to crush.

Step 3: Crush into a Fine Powder

Let the shells cool, then crush them using a blender, coffee grinder, or mortar and pestle. Aim for a powder so fine it looks like flour—no sharp edges allowed!

Step 4: Mix with Food

Stir the powder into your dog’s regular food. Start small to avoid upsetting their stomach.

Step 5: Stick to Portion Sizes

A general rule of thumb:

• Small dogs (under 20 lbs): ¼–½ teaspoon of powder, 2–3 times per week.
• Medium dogs (20–50 lbs): ½–1 teaspoon, 2–3 times per week.
• Large dogs (50+ lbs): 1–2 teaspoons, 2–3 times per week.

Note: These are guidelines, not rules. Your vet can adjust based on your dog’s age, breed, and health.

Healthier Alternatives to Eggshells for Extra Nutrition

If eggshells feel too risky, or you want more nutrient-dense options, try these calcium-rich alternatives:

1. Plain Yogurt or Kefir

Dairy products like plain, unsweetened yogurt or kefir are packed with calcium, probiotics, and protein. They’re gentler on the stomach than eggshells and taste great to most dogs. Avoid flavored versions (sugar is toxic to dogs!).

2. Sardines (Packed in Water)

Sardines are a superfood for dogs: they’re rich in calcium (from tiny, edible bones), omega-3s (for skin and coat), and protein. Look for sardines packed in water, not oil or salt.

3. Bone Broth

Simmering bones (chicken, beef, or turkey) creates a nutrient-dense broth full of calcium, collagen, and minerals. It’s easy to digest and perfect for picky eaters or dogs recovering from illness.

4. Commercial Calcium Supplements

If your vet recommends extra calcium (e.g., for a nursing mom or growing puppy), opt for a vet-approved supplement. These are formulated to balance calcium and phosphorus, avoiding the risks of over-supplementation.

FAQ: Your Eggshell Questions Answered

Q: Can puppies eat eggshells?

A: Puppies need calcium for growth, but their needs are precise. Too much calcium can lead to skeletal issues, especially in large breeds. Ask your vet before giving eggshells to puppies under 1 year old.

Q: Will eggshells “clean” my dog’s teeth?

A: No. Some people claim eggshells act as a natural toothbrush, but there’s no evidence to support this. Rough shell fragments could even scratch gums or damage enamel. Stick to dog-safe toothpaste and regular dental checkups!

Q: Are raw eggshells safer than cooked?

A: No—raw shells carry a higher salmonella risk. Cooking kills bacteria and makes shells easier to crush. Always cook eggshells before feeding.

Q: My dog has kidney disease. Can they eat eggshells?

A: Probably not. Dogs with kidney issues can’t excrete excess calcium, which can build up and cause further damage. Skip eggshells and ask your vet for kidney-friendly calcium sources.

Q: How often can I feed eggshells?

A: 2–3 times per week at most. Daily feeding increases the risk of calcium overload.

Conclusion: Moderation is Key

Eggshells can be a healthy, budget-friendly addition to your dog’s diet—when prepared safely and served in moderation. They’re rich in calcium, support bone health, and are easy to make at home. But they’re not a replacement for a balanced diet, and they come with risks like choking or calcium overload.

As with any new food, start small, watch for signs of upset, and consult your vet first. Every dog is unique, and what works for one may not work for another.

At the end of the day, the goal is to keep your pup happy and healthy—and a little eggshell powder (when done right) might just be the cherry on top of their already awesome diet.

References

• American Kennel Club (AKC). “Can Dogs Eat Eggs?” akc.org.
• Journal of Animal Physiology and Animal Nutrition. “Eggshell Calcium as a Source of Calcium for Dogs.” 2019.
• PetMD. “Calcium for Dogs: Why It’s Important and How Much They Need.” petmd.com.
• FDA. “Salmonella and Eggs: What You Need to Know.” fda.gov.