Why Is My Dog Eating His Poop? Causes, Fixes & Coprophagia Guide

Understanding Coprophagia: Why Dogs Eat Their Own Feces

If you've caught your dog snacking on something you'd rather not identify, you're not alone. Coprophagia — the scientific term for feces-eating — affects an estimated 16% of dogs according to a study published in the Applied Animal Behaviour Science journal. While it's one of the most reviled canine behaviors, it's also one of the most misunderstood.

The reasons your dog is eating his poop can range from simple behavioral habits to underlying medical conditions that require veterinary attention. Understanding the root cause is essential before you can effectively address the behavior. Let's break down the science, the triggers, and the solutions that actually work.

The Medical Reasons Behind Coprophagia

Before assuming your dog's poop-eating is purely behavioral, it's critical to rule out medical causes. According to the Merck Veterinary Manual, several health conditions can drive or contribute to this behavior:

Malabsorption and Maldigestion Disorders

When a dog's digestive system fails to properly absorb nutrients, the resulting feces may still contain partially digested food particles — making them smell and taste appealing to the dog. Conditions include:

• Exocrine Pancreatic Insufficiency (EPI): The pancreas fails to produce adequate digestive enzymes. Dogs with EPI produce large volumes of pale, foul-smelling stool that may still contain usable nutrients. EPI affects approximately 1 in 1,000 dogs, with German Shepherds and Rough-Coated Collies at higher risk.
• Inflammatory Bowel Disease (IBD): Chronic inflammation of the intestinal lining impairs nutrient absorption. Affected dogs may eat feces to reclaim lost nutrients.
• Intestinal Parasites: Roundworms, hookworms, and whipworms compete for nutrients in the gut. A heavy parasite load can leave the dog nutritionally deficient, driving scavenging behaviors including coprophagia.

Endocrine and Metabolic Conditions

• Diabetes Mellitus: Uncontrolled diabetes causes polyphagia (excessive hunger) even when the dog is eating normally. The body cannot properly utilize glucose, creating a persistent sensation of hunger.
• Cushing's Disease (Hyperadrenocorticism): Excess cortisol production leads to increased appetite and altered metabolism. Dogs with Cushing's often exhibit food-seeking behaviors, including eating non-food items.
• Hyperthyroidism: Though rare in dogs (more common in cats), thyroid tumors can accelerate metabolism and drive compulsive eating.

Nutritional Deficiencies

Dogs fed nutritionally incomplete diets — particularly homemade diets formulated without AAFCO compliance or veterinary nutritionist oversight — may seek out feces to compensate for missing vitamins and minerals. Deficiencies in B vitamins, vitamin K, and certain amino acids have been linked to coprophagia in clinical observations.

Behavioral Reasons Your Dog Is Eating His Poop

When medical causes have been ruled out by your veterinarian, behavioral factors become the primary focus. Research published in Applied Animal Behaviour Science found that coprophagia is more prevalent in dogs described as "greedy eaters" and in households where dogs have access to feces regularly.

Natural Scavenging Instinct

Dogs evolved as opportunistic scavengers. In the wild, canids consume feces — particularly the feces of herbivores — to extract residual nutrients and beneficial gut bacteria. Your dog's wild ancestors didn't have the luxury of being selective. This instinct persists in many domestic dogs, especially those with strong food-drive genetics (Labrador Retrievers, Beagles, and sporting breeds are frequently overrepresented in coprophagia cases).

Maternal Behavior Carryover

Nursing mothers instinctively consume the feces of their puppies during the first three weeks of life. This behavior serves two evolutionary purposes: keeping the den clean to avoid attracting predators and stimulating the puppies' digestive systems. Some dogs retain this behavior into adulthood, particularly females who have whelped litters.

Attention-Seeking and Learned Behavior

If you've ever reacted strongly when catching your dog eating feces — yelling, chasing, or making a big fuss — your dog may have learned that this behavior reliably gets your attention. Even negative attention is reinforcing for dogs who are attention-deprived. The behavior becomes a learned strategy: eat poop → human engages with me.

Anxiety and Stress

Dogs experiencing separation anxiety, environmental stress (new home, new baby, schedule changes), or confinement distress may engage in coprophagia as a displacement behavior — similar to how some dogs lick their paws excessively or chase their tails when stressed.

Punishment-Based House Training Backfire

Dogs who have been punished (rubbing nose in feces, yelling, physical correction) for having accidents indoors may learn to eat their feces to "hide the evidence." This is one reason positive reinforcement house training methods are strongly recommended over punitive approaches. Force-free methods build trust rather than fear.

Health Risks of Coprophagia

While eating their own feces is generally low-risk for healthy dogs (though understandably unpleasant for owners), consuming the feces of other animals introduces real health hazards:

• Parasite Transmission: Roundworm, hookworm, whipworm, and Giardia eggs are shed in feces. A dog eating infected feces can acquire a new parasitic infection or increase their existing parasite burden.
• Viral Exposure: Parvovirus is shed in extremely high concentrations in feces and can survive in the environment for months. While vaccinated adult dogs are generally protected, puppies with incomplete vaccination series are at serious risk.
• Bacterial Pathogens: Salmonella, E. coli, and Campylobacter can all be transmitted through fecal ingestion. Some of these are zoonotic — meaning they can spread from your dog to you through licking and close contact.
• Medication Residues: If the feces come from another animal on medication (heartworm preventives, NSAIDs, chemotherapy drugs), your dog could ingest unintended drug doses.
• Toxic Substances: Feces from animals that ingested toxic baits, poisonous plants, or foreign objects may contain concentrated toxins.

Proven Solutions to Stop Your Dog from Eating Poop

Addressing coprophagia effectively requires a multi-pronged approach. No single solution works for every dog, but combining strategies significantly improves success rates.

Step 1: Veterinary Evaluation

Before trying behavioral fixes, get a thorough veterinary exam including:

• Complete blood count (CBC) and chemistry panel ($80–$200)
• Fecal parasite screening ($40–$80)
• TLI test if EPI is suspected ($150–$300)
• Dietary assessment — bring your dog's current food packaging to the appointment

Step 2: Nutritional Optimization

Switch to an AAFCO-compliant, complete-and-balanced diet appropriate for your dog's life stage. Look for:

• A named animal protein as the first ingredient (chicken, lamb, salmon — not "meat meal")
• Guaranteed analysis showing minimum 22% protein for adult maintenance (per AAFCO standards)
• Adequate fiber content (3–5% crude fiber) to promote satiety and proper digestion
• Consider a veterinary-formulated diet if your dog has specific digestive needs

Some veterinarians recommend adding digestive enzyme supplements (such as ProZyme or NaturVet Enzymes) or probiotics (like Purina FortiFlora or Nutramax Proviable) to improve nutrient absorption, though evidence for their direct impact on coprophagia is limited to anecdotal reports.

Step 3: Environmental Management

This is the single most effective immediate strategy:

• Immediate cleanup: Pick up feces within 60 seconds of elimination. If the feces aren't available, the behavior can't occur. Use a leash during potty breaks if needed to maintain control.
• Cat litter box management: If your dog is eating cat feces (extremely common — cat food is high-protein and cat feces can be very appealing to dogs), switch to a covered litter box, place it behind a baby gate with cat-sized openings, or use a self-cleaning litter box like the Litter-Robot 4 ($699) that removes waste automatically.
• Yard maintenance: Do a daily yard sweep to remove all feces before letting your dog out for free time.
• Leash control on walks: Keep your dog on a 4–6 foot leash in areas where other dogs have defecated. Teach a reliable "leave it" cue using positive reinforcement.

Step 4: Behavioral Training

Using force-free, positive reinforcement methods:

• Teach "Leave It": Start with low-value items on the floor. When your dog looks at the item but doesn't touch it, mark (clicker or "yes!") and reward with a high-value treat from your hand. Gradually increase difficulty. Once reliable, practice near feces (use fake setups with peanut butter on a paper towel to simulate the scenario safely).
• Teach "Come" After Elimination: Immediately after your dog finishes pooping, call them to you and reward with a treat worth more than the feces (freeze-dried liver, small pieces of chicken). Over time, the dog learns: poop → go to human → get something better.
• Increase Mental Enrichment: Bored dogs are more likely to engage in coprophagia. Provide 20–30 minutes of daily mental stimulation through puzzle feeders (Kong Wobbler $15–$20, Outward Hound Nina Ottosson puzzles $12–$25), scent work, or training sessions.
• Counter-Conditioning: Pair the presence of feces with something your dog loves. When your dog notices feces but doesn't eat it, immediately reward. This changes the emotional response from "that's food" to "that predicts treats from my human."

Step 5: Taste Deterrents (Mixed Evidence)

Commercial products like For-Bid ($16–$22 for a 4 oz container) and NaturVet Coprophagia Deterrent ($12–$18) are designed to make feces taste unpleasant. These are typically sprinkled on the dog's food and work by altering the taste of the resulting feces.

The evidence for these products is mixed. Some owners report significant reduction in coprophagia within 1–2 weeks, while others see no change. Effectiveness may depend on the underlying motivation — dogs eating feces for nutritional reasons may be more deterred than those doing it for behavioral reasons. Pineapple, papaya, or meat tenderizer (containing papain enzyme) are sometimes recommended as home alternatives, but consult your veterinarian before adding any supplement to your dog's diet.

When Coprophagia Involves Other Animals' Feces

Dogs who eat the feces of other species — cats, horses, rabbits, geese — face additional risks and require targeted management:

• Cat feces: Cat food is calorie-dense and high-protein, making cat feces especially appealing. Beyond the disgust factor, cat feces can transmit Toxoplasma gondii, a parasite that can cause neurological issues in dogs and is also zoonotic to humans.
• Horse manure: Horses treated with ivermectin-based dewormers pass drug residues in their manure. While small amounts are usually harmless, large quantities can cause toxicity in dogs — particularly MDR1 gene mutation carriers (Collies, Australian Shepherds, and related breeds).
• Wild animal feces: Raccoon feces can contain Baylisascaris procyonis (raccoon roundworm), which is extremely dangerous to dogs and humans. Deer feces may carry Chronic Wasting Disease prions, though transmission risk to dogs is currently considered low.

Puppy Coprophagia vs. Adult Dog Coprophagia

Age significantly influences both the likelihood and the approach to addressing this behavior:

• Puppies (under 6 months): Coprophagia is extremely common in puppies as part of normal oral exploration. Most puppies outgrow this behavior by 6–9 months if the environment is managed (prompt cleanup) and they receive adequate nutrition. Do not punish puppies for this — redirect and reward alternative behaviors.
• Adolescent dogs (6–18 months): If the behavior persists past puppyhood, it's more likely to become an entrenched habit. This is the critical window for training "leave it" and establishing consistent cleanup routines.
• Adult dogs (18 months+): New-onset coprophagia in an adult dog who previously didn't eat feces should trigger a veterinary exam first. Behavioral causes are still possible, but medical causes become more likely with age.
• Senior dogs (7+ years): Cognitive decline (Canine Cognitive Dysfunction) can lead to coprophagia in previously clean dogs. Senior dogs may also develop EPI, diabetes, or other metabolic conditions that drive the behavior. A senior wellness panel (blood work, urinalysis, thyroid check) is strongly recommended.

Frequently Asked Questions About Dogs Eating Poop

Is it dangerous for my dog to eat his own poop?

For a healthy, regularly dewormed dog eating his own freshly produced feces, the health risk is relatively low. The primary concerns are aesthetic and the potential for reinforcing the habit. However, if your dog has an existing parasitic infection, eating his own feces can increase the parasite burden through re-infection. The risk increases substantially when dogs eat the feces of other animals.

Will adding pineapple to my dog's food stop him from eating poop?

The theory is that bromelain (an enzyme in pineapple) makes feces taste bitter. Some owners report success with adding 1–2 tablespoons of fresh, unsweetened pineapple per meal for a medium-sized dog (30–50 lb). However, there is no peer-reviewed clinical evidence supporting this approach, and too much pineapple can cause gastrointestinal upset due to the sugar and fiber content. It's a low-risk home remedy to try, but don't rely on it as your only strategy.

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

Cat feces are particularly tempting because cat food is high in protein and fat, and cats don't fully digest all nutrients. Solutions include: relocating the litter box behind a baby gate (use one with a cat-sized pet door, such as the Carlson Pet Products Design & Decor gate, $65–$80), switching to a top-entry litter box like the Modkat ($80–$100), scooping the box at least twice daily, or using a self-cleaning litter box. Never punish your dog for this — manage the environment instead.

Should I be worried if my dog eats rabbit or deer droppings in the yard?

Rabbit droppings are generally low-risk for healthy, vaccinated dogs, though they can occasionally carry coccidia. Deer droppings carry a small risk of transmitting parasites. The bigger concern is if the droppings are from raccoons, which can carry Baylisascaris — a potentially fatal roundworm. If you find raccoon latrines (piles of droppings in a specific area) on your property, have them professionally removed while wearing protective gear.

How long does it take to stop coprophagia with training?

With consistent environmental management (immediate cleanup) combined with "leave it" training and increased enrichment, most dogs show significant improvement within 3–6 weeks. However, dogs who have been eating feces for years may take 2–3 months of consistent management. The key word is consistent — even one "free" opportunity to eat feces can set progress back significantly.

Can probiotics help stop my dog from eating poop?

There's a plausible theory that improving gut microbiome health reduces coprophagia, particularly if the behavior is driven by a dog seeking beneficial bacteria. Products like Purina FortiFlora ($30–$35 for a 30-day supply) or Nutramax Proviable-DC ($25–$30) are safe to try and may improve overall digestive health. However, probiotics alone are unlikely to resolve coprophagia without concurrent environmental management and training.