Why Do Dogs Eat Their Own Poop? Coprophagia Causes, Risks & Solutions

The Uncomfortable Truth About Coprophagia in Dogs

If you've ever caught your dog snacking on something they definitely shouldn't be, you're not alone. Coprophagia — the technical term for dogs eating feces — is one of the most common yet least discussed behavioral issues dog owners face. According to a study published in the American Journal of Veterinary Research, approximately 16% of dogs are considered "serious" stool eaters, meaning they've been caught in the act five or more times.

But why do dogs eat their own poop? The answer isn't simple. It's a convergence of evolutionary biology, nutritional gaps, behavioral conditioning, and sometimes underlying medical conditions. Understanding the root cause is the first step toward solving what is, frankly, one of the most unpleasant habits a dog can develop.

What Exactly Is Coprophagia?

Coprophagia (from the Greek kopros, meaning feces, and phagein, meaning to eat) describes the consumption of feces by any animal. In dogs, it can manifest in several ways:

• Autocopphagia: Eating their own feces
• Allocoprophagia: Eating the feces of other dogs
• Interspecific coprophagia: Eating feces from other species (cat feces is a notorious favorite)

Nursing mother dogs will instinctively consume the feces of their puppies during the first few weeks of life — this is normal maternal behavior designed to keep the den clean and reduce predator-attracting scent. But when adult dogs or weaned puppies develop this habit, it becomes a behavioral or medical concern.

Why Do Dogs Eat Their Own Poop? The Science Behind the Behavior

There is no single cause of coprophagia. Veterinary behaviorists and researchers have identified multiple contributing factors, and most dogs who practice coprophagia are influenced by two or more of them simultaneously.

Evolutionary and Ancestral Drivers

Wild canids — wolves, coyotes, and foxes — have been observed consuming feces, particularly when food is scarce. Feces can contain partially digested plant matter and residual nutrients. For ancestral dogs, eating feces may have served as a survival mechanism during lean periods. Additionally, den-cleaning behavior reduced the scent trail that predators or rival packs could follow.

Modern domestic dogs retain some of these hardwired impulses. A 2018 study from the University of California, Davis School of Veterinary Medicine found that dogs with a history of coprophagia were no more likely to have nutritional deficiencies than dogs who didn't eat feces — suggesting the behavior is more strongly rooted in behavioral and environmental factors than in dietary need alone.

Nutritional Deficiencies and Malabsorption

While not the primary cause in most cases, certain nutritional gaps can trigger coprophagia:

• Vitamin B deficiency: Particularly thiamine (B1), which affects energy metabolism
• Enzyme deficiency: Dogs with exocrine pancreatic insufficiency (EPI) cannot properly digest food, leading to nutrient-rich feces that the dog may attempt to "reprocess"
• Protein malabsorption: Poor-quality diets with low bioavailability can result in feces that still smells and tastes like food to the dog
• Parasite burden: Intestinal worms (roundworms, hookworms, giardia) steal nutrients, leaving the dog hungry and more likely to seek alternative food sources

If your dog is eating feces AND showing signs like weight loss, chronic diarrhea, a dull coat, or increased appetite without weight gain, a veterinary workup is essential. Your vet will likely run a fecal flotation test ($25–$50), a complete blood count ($80–$150), and potentially a TLI (trypsin-like immunoreactivity) test ($75–$120) to check for pancreatic issues.

Behavioral and Environmental Causes

For the majority of coprophagic dogs, the root cause is behavioral:

• Attention-seeking: If you react strongly (chasing, yelling, rushing over) when your dog eats feces, they may learn that this behavior earns your attention — even negative attention is reinforcing
• Boredom and understimulation: Dogs left alone for long periods in yards with nothing to do may eat feces out of sheer boredom
• Anxiety and stress: Dogs experiencing separation anxiety or environmental stress may develop coprophagia as a displacement behavior
• Punishment-based house training: Dogs who were rubbed in their feces or harshly punished for indoor accidents may eat their own stool to "hide the evidence" — this is a learned avoidance behavior
• Confinement: Dogs kept in small crates or kennels for extended periods are more likely to eat feces simply because it's the only thing available
• Mimicry: Dogs in multi-dog households may copy the behavior from a coprophagic housemate

Health Risks: When Poop-Eating Becomes Dangerous

While coprophagia is gross, it isn't always immediately dangerous. However, there are specific scenarios where this habit poses serious health risks:

Parasite Transmission

Feces is the primary transmission vector for many intestinal parasites. When a dog eats feces (especially from other dogs or unknown sources), they risk ingesting:

• Roundworm eggs (Toxocara canis): Can survive in soil for years; zoonotic risk to humans
• Hookworm larvae (Ancylostoma caninum): Cause anemia and bloody diarrhea
• Whipworm eggs (Trichuris vulpis): Difficult to diagnose; cause chronic colitis
• Giardia cysts: Cause severe diarrhea and dehydration
• Coccidia oocysts: Particularly dangerous in puppies

Bacterial and Viral Exposure

Feces can carry dangerous pathogens including Salmonella, E. coli, Campylobacter, and Clostridium. If the feces comes from a dog infected with parvovirus, canine coronavirus, or leptospirosis, the consuming dog faces direct exposure.

Toxic Substance Ingestion

If the source dog has ingested something toxic (rodenticide, xylitol, chocolate, grapes), residual toxins may be present in the feces. Cat feces from litter boxes may also contain clumping litter compounds that cause intestinal blockage.

How to Stop Your Dog From Eating Poop: A Step-by-Step Plan

Breaking a coprophagia habit requires a multi-pronged approach. No single method works for every dog, so be prepared to combine strategies and stay consistent for at least 4–6 weeks before evaluating results.

Step 1: Rule Out Medical Causes

Before implementing behavioral solutions, schedule a veterinary exam. Request:

• Comprehensive fecal analysis (flotation + Giardia ELISA): $40–$80
• Complete blood count and chemistry panel: $100–$200
• Nutritional assessment and diet review
• TLI test if pancreatic insufficiency is suspected: $75–$120

Always consult your veterinarian before starting any supplement or dietary change to address coprophagia.

Step 2: Optimize Nutrition

Switch to a high-quality, AAFCO-approved diet with a named animal protein as the first ingredient. Look for:

• Minimum 25% crude protein for adult dogs (dry matter basis)
• Highly digestible ingredients (avoid excessive fillers like corn gluten meal)
• Added digestive enzymes or probiotics (e.g., FortiFlora by Purina or Proviable by Nutramax)

Some owners report success adding digestive enzyme supplements like ProZyme ($18–$25 for a 4 oz container) or NaturVet Digestive Enzymes ($12–$18) to their dog's food. These help ensure maximum nutrient absorption, making feces less nutritionally appealing.

Step 3: Environmental Management

This is the single most effective intervention:

• Immediate cleanup: Pick up feces within 60 seconds of elimination. Use a consistent "go potty" cue on leash so you can control where and when your dog eliminates
• Leash supervision: During the retraining period (minimum 4 weeks), always walk your dog on a 6-foot leash during potty breaks. Reward immediately with a high-value treat (freeze-dried liver, small pieces of chicken) after elimination and move away from the area
• Cat litter box management: Use a top-entry litter box (e.g., Modkat Flip Litter Box, $75–$90) or install a baby gate with a cat-sized opening to prevent dog access
• Yard patrol: Walk your yard daily to remove feces before your dog has access

Step 4: Taste Deterrents

Commercial stool deterrents make feces taste unappealing to the dog. These are fed to the dog and pass through the digestive system to alter the taste of the resulting feces:

• For-Bid ($15–$22 for a 2.6 oz shaker): Contains wheat gluten and sodium glutamate; sprinkle on food for 2–3 weeks
• NaturVet Coprophagia Deterrent ($12–$16 for 60 chews): Contains yucca schidigera and garlic (in safe, low doses)
• VetriScience Probiotic Everyday ($18–$24): While not a deterrent per se, improving gut health often reduces coprophagia

Important: Taste deterrents only work for autocoprophagia (eating their own feces). If your dog eats other dogs' or cats' feces, environmental management is essential because you can't control what those other animals eat.

Step 5: Behavioral Training

Using positive reinforcement and force-free methods, teach these key behaviors:

• "Leave it": Start with low-value items on the ground, progress to higher-value items. Reward compliance with a treat from your hand, never the item on the ground. Practice 5–10 minutes daily for 3–4 weeks before reliable
• "Come" / recall: Build a strong recall using high-value rewards. Call your dog to you immediately after they eliminate, before they can turn around and investigate
• Muzzle training: For severe cases, a basket muzzle (e.g., Baskerville Ultra Muzzle, $20–$30) during outdoor time prevents feces consumption while allowing panting and drinking. This is a management tool, not a punishment

What About Home Remedies and Old Wives' Tales?

Several popular "solutions" circulate online. Here's what actually works and what doesn't:

• Feeding pineapple or zucchini: The theory is that enzymes in pineapple make feces taste bad. Anecdotal success in some dogs, but no clinical evidence. Safe to try in small amounts (1–2 tablespoons for a medium dog)
• Adding meat tenderizer (papain) to food: Similar theory to pineapple. Not harmful in small doses, but inconsistent results
• Hot sauce or pepper on feces: Can cause oral and gastrointestinal irritation. Not recommended — the capsaicin can burn your dog's mouth and eyes if they paw at their face afterward
• Pumpkin puree: Adds fiber, which can bulk up stools and make them less appealing. Safe at 1–4 tablespoons per meal depending on dog size. Plain canned pumpkin only — never pie filling, which contains xylitol and spices

When to See the Vet About Coprophagia

Your veterinarian may recommend the Merck Veterinary Manual's diagnostic framework for chronic gastrointestinal issues, which includes imaging, bloodwork, and potentially a referral to a veterinary internal medicine specialist for advanced testing like abdominal ultrasound ($300–$600) or endoscopy ($800–$2,000).

Frequently Asked Questions

Is it normal for puppies to eat their own poop?

Yes, coprophagia is relatively common in puppies under 6 months old. It's often exploratory behavior, similar to how human babies put everything in their mouths. Most puppies outgrow this by 6–9 months. However, if the behavior persists past 9 months, intervene with the strategies above before it becomes an entrenched habit.

Can dogs get sick from eating their own feces?

While eating their own freshly produced feces is less risky than eating feces from unknown dogs, it still poses health concerns. The main risks are re-ingesting parasites (if already infected), bacterial overgrowth, and oral-fecal transmission of pathogens. Dogs who eat cat feces face additional risks from Toxoplasma gondii and litter ingestion.

Does feeding my dog pineapple stop them from eating poop?

There's no scientific evidence that pineapple reliably stops coprophagia. The theory is that bromelain (an enzyme in pineapple) alters the taste of feces. Some owners report success, others see no change. It's safe to try — feed 1–2 tablespoons of fresh pineapple chunks for a medium-sized dog — but don't rely on it as your only strategy.

Will my dog outgrow coprophagia without intervention?

Some dogs will, particularly if the behavior started as puppy exploration. However, research from the UC Davis veterinary behavior program suggests that dogs who continue coprophagia past 9 months are unlikely to stop without active intervention. The longer the behavior persists, the more difficult it becomes to extinguish.

Is coprophagia a sign of a nutritional deficiency?

Sometimes, but not usually. While vitamin B deficiency, enzyme insufficiency, and parasite-related malabsorption can contribute to coprophagia, most dogs who eat feces are on nutritionally adequate diets. A veterinary exam and bloodwork can rule out deficiencies. According to the American Veterinary Medical Association, feeding a complete and balanced diet appropriate for your dog's life stage is the best nutritional foundation.

Can I use punishment to stop my dog from eating poop?

No. Punishment-based methods (yelling, physical correction, rubbing the dog's nose in feces) are counterproductive and can worsen the behavior. Dogs punished for elimination may eat feces to hide evidence, creating a vicious cycle. Force-free, positive reinforcement methods — rewarding your dog for leaving feces and coming to you instead — are more effective and preserve your dog's trust.

My dog eats cat poop from the litter box. How do I stop this?

Cat feces is particularly attractive to dogs due to its high protein content. Solutions include: switching to a top-entry or enclosed litter box, placing the box behind a baby gate with a cat-sized opening, using a litter box furniture enclosure (e.g., Merry Products Litter Box Enclosure, $80–$120), or placing the box in a room with a microchip-activated cat door (e.g., SureFlap Microchip Pet Door, $90–$130). Taste deterrents fed to the cat are not recommended without veterinary guidance.