Dog Eating Own Poop — a behavior called coprophagia — due to a mix of instinctual, behavioral, and sometimes medical reasons. It’s more common than most owners realize, affecting roughly 1 in 6 dogs regularly. While usually harmless, it can signal nutritional gaps, anxiety, or health issues. The most effective fix is prompt cleanup, positive redirection, and a vet checkup to rule out underlying causes.

You’re walking your dog in the yard when suddenly you see something disgusting: your dog eating its own poop.

Most pet owners react with shock, confusion, and one big question:

“Why would my dog do something like that?”

The truth is, this behavior—known as coprophagia—is surprisingly common among dogs. In fact, research suggests around 23% of dogs have eaten feces at least once, and roughly 1 in 6 dogs are frequent poop eaters.

While it may seem disturbing to humans, dogs have evolutionary, behavioral, and sometimes medical reasons for doing it.

In this guide, you’ll learn:

• Why dogs eat their own poop

• Whether it’s dangerous for your dog

• Signs that indicate a health problem

• Proven ways to stop the behavior

• Vet-recommended prevention tips

By the end, you’ll know exactly how to handle and prevent poop-eating in dogs.

What Is Coprophagia in Dogs?

Coprophagia is the technical term for poop-eating behavior in animals. In dogs, it can take a few forms: a dog eating their own feces (autocoprophagia), eating the feces of other dogs, or eating the feces of other species like cats or deer.

While it’s deeply unpleasant from a human perspective, it’s important to understand that this behavior sits somewhere between “completely normal in certain contexts” and “worth investigating with your vet” — depending on the dog, the frequency, and the circumstances.

How Common Is It?

More common than you might think. Research published by Dr. Benjamin Hart and colleagues at the University of California, Davis — based on two web surveys of over 3,000 dog owners — found that 16% of dogs sampled engaged in frequent coprophagy, defined as having been seen eating stools at least six times. PubMed Broader estimates suggest that between 23% and 49% of domestic dogs exhibit the behavior at some point in their lives. ScienceDirect

That means if you’re reading this, there’s a solid chance your neighbor’s dog is doing the same thing — they’re just too embarrassed to bring it up.

Why Do Dogs Eat Their Own Poop? The Real Reasons

There’s no single answer. Coprophagia has a complicated web of causes — some rooted in biology, some in behavior, and some in health. Here are the most well-supported explanations.

1. It’s an Ancestral Instinct

This is perhaps the most surprising finding from modern research. Scientists now hypothesize that coprophagy reflects a tendency inherited from ancestral wolves to keep the den area free of fecal-borne intestinal parasites — parasites that would not yet be infectious in fresh stool, but could develop into infective larvae after two days. PubMed

This explains one of the most consistent findings in the data: 92% of poop-eating dogs want fresh poop, only one to two days old, American Kennel Club and 85% of coprophagic dogs are reported to eat stools no more than two days old. PubMed Central They’re not just randomly eating feces — they’re targeting fresh ones specifically, exactly as an ancestral parasite-defense instinct would predict.

2. Normal Maternal Behavior

Coprophagia is considered completely normal in nursing mother dogs, who consume their puppies’ feces to keep the den area clean. ScienceDirect If you have a nursing female and she’s eating her pups’ poop, this is natural, hardwired behavior — not a problem that needs fixing.

Puppies themselves may also experiment with eating feces early in life, often as part of exploring their environment. Most grow out of it on their own.

3. Behavioral and Environmental Triggers

Not all poop-eating is instinct-driven. Several behavioral causes are well-documented:

• Confinement and boredom. Studies have shown that dogs kept alone in kennels or basements are more likely to eat poop than those who live close to their people. Spending too much time confined in a small space can cause a dog to develop a poop-eating problem. American Kennel Club
• Anxiety and stress. Dogs under chronic stress may develop compulsive or unusual behaviors, including coprophagia. Anxiety disorders and insufficiently stimulating environments are recognized risk factors. ScienceDirect
• Attention-seeking. Dogs may eat their own poop to get a reaction from their humans — and they inevitably will. American Kennel Club If your dog notices that eating feces causes you to rush over, shout, or engage with them, they may repeat the behavior for the attention it generates.
• Punishment during house training. Coprophagia is sometimes a result of harsh punishment during house training. Dogs may eliminate and then eat their own poop to get rid of the evidence — then get punished anyway, creating a vicious cycle. American Kennel Club
• Multi-dog households. Coprophagia is more common in multi-dog homes. In single-dog homes, about 20% of dogs had the habit, while in homes with three or more dogs, that rose to 33%. American Kennel Club

4. Medical Causes Worth Ruling Out

Sometimes poop-eating is the body’s way of compensating for something going wrong internally. Medical triggers to discuss with your vet include:

• Malabsorption disorders — conditions where the digestive system fails to absorb nutrients properly, leaving the dog hungry despite eating
• Parasites — intestinal worms can cause dogs to seek out unusual food sources
• Enzyme deficiencies — a shortage of digestive enzymes can leave partially digested nutrients in feces, making them smell (and seem) appealing to the dog
• Thyroid issues or diabetes — conditions that drive increased appetite
• Certain medications — medications that increase appetite may put pets at risk for coprophagia. ScienceDirect

If your dog has recently started eating poop and the behavior is new, a vet visit is strongly recommended to rule out these possibilities before focusing on behavioral strategies.

5. Breed and Individual Tendencies

Research shows breed differences in predisposition to coprophagia. Hounds and Terriers are the breeds most likely to be coprophagic, while Shetland Sheepdogs appear to be among the greatest individual-breed offenders. Poodles appear to be the least likely to show this behavior. Psychology Today

Female dogs are more likely to eat poop, while intact males are least likely. American Kennel Club Dogs described by their owners as “greedy eaters” also show a significantly higher tendency.

Is It Dangerous? Health Risks of Coprophagia

For most healthy dogs, eating their own poop poses a relatively low direct health risk — but it’s not completely risk-free either. Here’s what to be aware of:

• Parasites and pathogens: Feces can contain intestinal parasites, bacteria like Campylobacter and Salmonella, and viral particles. A dog regularly eating feces — especially from other animals — has an elevated exposure risk.
• Reinfection: If a dog has an active parasitic infection, eating their own stool can cause reinfection, making treatment harder.
• Zoonotic concern: Some of the pathogens in dog feces can be passed to humans. This makes face-licking and close contact after an episode genuinely worth managing carefully — especially in households with young children or immunocompromised individuals.

For the most part, coprophagia has no established clinically abnormal associations for the dog itself in terms of gastrointestinal upset or nutritional deficiency ScienceDirect — but the human health implications and the challenge it poses to the human-animal bond make it well worth addressing.

Is It Dangerous? Health Risks of Coprophagia

For most healthy dogs, eating their own poop poses a relatively low direct health risk — but it’s not completely risk-free either. Here’s what to be aware of:

• Parasites and pathogens: Feces can contain intestinal parasites, bacteria like Campylobacter and Salmonella, and viral particles. A dog regularly eating feces — especially from other animals — has an elevated exposure risk.
• Reinfection: If a dog has an active parasitic infection, eating their own stool can cause reinfection, making treatment harder.
• Zoonotic concern: Some of the pathogens in dog feces can be passed to humans. This makes face-licking and close contact after an episode genuinely worth managing carefully — especially in households with young children or immunocompromised individuals.

For the most part, coprophagia has no established clinically abnormal associations for the dog itself in terms of gastrointestinal upset or nutritional deficiency ScienceDirect — but the human health implications and the challenge it poses to the human-animal bond make it well worth addressing.

How to Stop Your Dog From Eating Poop

Here’s where most owners want to jump to — and understandably so. The honest reality, backed by research: this behavior is genuinely difficult to eliminate completely. Eliminating coprophagia with behavioral modifications reported a success rate of only 1 to 4%, and reported success rates of food additives and tablets marketed to stop coprophagy ranged from 0 to 2%. DVM360

That’s sobering — but it doesn’t mean you’re powerless. It means you need a realistic, multi-pronged approach.

Step 1: Clean Up Immediately

Preventing access to feces has been shown to be the most common and effective way of stopping the behavior. ScienceDirect The simplest intervention is prompt, consistent cleanup. If there’s no poop available, there’s nothing to eat. Supervise outdoor time and clean up the moment your dog eliminates.

Step 2: Rule Out Medical Causes First

Before investing time and money in behavioral interventions, take your dog to the vet for a full checkup. The minimum evaluation should include physical, behavioral, and fecal examination — ideally with bloodwork and parasite screening. ScienceDirect If there’s an underlying medical cause, treating it may resolve the behavior entirely.

Step 3: Use Positive Redirection

Teach your dog a reliable “leave it” or “come” cue. When they move toward their feces, redirect them immediately with a high-value treat or toy and reward them enthusiastically for responding. Over time, this builds a competing behavior — looking to you rather than to the ground.

The most effective behavioral treatments are avoidance, redirection, and differential reinforcement of alternative behavior — rewarding the dog for doing something incompatible with poop-eating. ScienceDirect

Step 4: Improve the Environment

If your dog is eating poop out of boredom or stress, improving their daily life can make a genuine difference:

• Increase daily exercise and mental stimulation
• Add enrichment activities (puzzle feeders, sniff walks, training sessions)
• Reduce time spent confined alone
• Address any underlying anxiety with your vet or a certified animal behaviorist

Step 5: Try Dietary Adjustments (With Realistic Expectations)

Some vets suggest adding digestive enzymes or switching to a higher-digestibility food if malabsorption is suspected. These adjustments can help if there’s a nutritional driver behind the behavior — but if the behavior is purely instinctual or behavioral, diet changes alone are unlikely to resolve it.

Changing the diet to one with greater digestibility or one with more bulk or fiber to better satiate the dog may help in cases where appetite is the primary driver. ScienceDirect

What Doesn’t Work

• Punishment: This tends to make things worse, not better — especially if it caused the behavior in the first place.
• Ignoring it indefinitely: If the behavior is new or sudden, don’t wait to see if it passes. Get a vet check done.
• Over-the-counter poop deterrent products: As the research shows, these have an almost negligible success rate in peer-reviewed studies.

When to See a Vet

Consult your veterinarian promptly if:

• The behavior is new and sudden (possible medical trigger)
• Your dog is also showing signs of weight loss, digestive issues, or lethargy
• The behavior is getting progressively worse despite management efforts
• Your dog is consuming feces from other animals (higher pathogen risk)
• You have young children or vulnerable family members in the home

For more guidance on keeping your dog healthy and happy at every life stage, explore our full dog care resource hub at PetsVines.

FAQ’s

Is it normal for puppies to eat poop?

Yes — puppies often explore the world with their mouths, including feces. Most grow out of this by 9 months. If it persists or intensifies, speak to your vet.

Can my dog make me sick by eating poop then licking me?

Potentially, yes. Dog feces can carry bacteria and parasites transmissible to humans. Wash hands after contact and discourage face-licking after a poop-eating episode.

Why does my dog eat other dogs’ poop but not their own?

Research shows that 85% of poop-eating dogs will not eat their own feces — only poop from other dogs. American Kennel Club This aligns with the ancestral den-cleaning hypothesis, where the target is feces deposited in the shared living area, not their own output.

Do poop-eating deterrent tablets work?

The clinical evidence is weak. Products designed to make stool taste unpleasant showed dismal success rates ranging from 0 to 2% in one large-scale survey. Psychology Today They may be worth trying, but should not be your primary strategy.

Why is my dog suddenly eating its own poop?

Sudden coprophagia may indicate:

• Stress or anxiety

• Dietary deficiencies

• A medical condition

If the behavior appears suddenly, consult your veterinarian.

Will dogs grow out of poop eating?

Many puppies grow out of it as they mature and receive proper training.

However, some adult dogs retain the habit without intervention.

Can eating poop make my dog sick?

Yes, especially if the feces contain parasites, bacteria, or toxins.

This is why preventing the behavior is important.

Why do dogs eat cat poop?

Cat feces often contain undigested protein from cat food, making it appealing to dogs.

However, it can expose dogs to parasites like toxoplasmosis.

Final Thoughts

Seeing your dog eating its own poop can be shocking, but it’s a behavior many dogs exhibit at some point in their lives.

In most cases, it’s linked to:

• Natural instincts

• Curiosity

• Boredom

• Diet issues

• Stress

The good news is that with consistent training, proper nutrition, and good hygiene, most dogs can break this habit.

If the behavior continues or appears suddenly, always consult a veterinarian to rule out medical problems.