Why Dogs Eat Poop: Causes of Coprophagia and How to Stop It

The Habit Nobody Wants to Talk About

Let's be honest — watching your dog eat poop is one of the most unpleasant experiences of pet ownership. You love your dog, but this particular behaviour can test even the most devoted owner's patience. And if it happens at the dog park in Vancouver or on a busy sidewalk in downtown Halifax, the embarrassment factor goes through the roof.

Coprophagia — the technical term for stool eating — is surprisingly common. Studies suggest that up to 25% of dogs engage in it at some point in their lives. While it's understandably revolting to us, it's important to understand that this behaviour usually has an identifiable cause — and, more importantly, a solution.

Why Do Dogs Eat Poop?

There's rarely a single explanation. Coprophagia can be driven by nutritional, medical, behavioural, or environmental factors, and sometimes it's a combination of several.

Nutritional Deficiencies

This is one of the most common underlying causes. Dogs eating a diet lacking in essential nutrients — particularly B vitamins, vitamin K, and key digestive enzymes — may instinctively seek out those nutrients from other sources, including feces.

When a dog's digestive system isn't fully absorbing nutrients, their stool may still contain partially digested material that smells appealing to them.

Enzyme Deficiencies

Dogs produce digestive enzymes in the pancreas to break down proteins, fats, and carbohydrates. Some dogs — particularly those with exocrine pancreatic insufficiency (EPI) — don't produce enough. The result is malabsorption: food passes through without being fully processed, and the stool becomes nutrient-rich enough to attract the dog back.

Boredom and Understimulation

A bored dog is a creative dog — unfortunately, that creativity sometimes includes eating things they shouldn't. Dogs left alone in a yard for long stretches, especially during Canada's long winters, may turn to coprophagia out of sheer boredom.

Learned Behaviour

Puppies explore the world with their mouths, and many will sample stool as part of normal curiosity. Most outgrow it, but if the behaviour gets a big reaction from the owner — even a negative one — the puppy may learn that eating poop gets attention.

Mother dogs naturally consume their puppies' feces to keep the den clean, and puppies who observe this may imitate the behaviour.

Stress and Anxiety

Dogs experiencing stress — from a new living situation, separation anxiety, or household tension — sometimes develop coprophagia as a coping mechanism.

Medical Conditions

Certain health issues can increase appetite or alter digestion in ways that make coprophagia more likely:

• Parasites — intestinal worms can rob your dog of nutrients, increasing the drive to seek nutrition from unusual sources
• Diabetes or Cushing's disease — conditions that increase hunger
• Thyroid disorders — can affect metabolism and appetite
• Medications — some drugs, particularly steroids, dramatically increase appetite

Health Risks of Coprophagia

Beyond the obvious gross factor, stool eating carries real health risks:

• Parasites: Dogs can ingest roundworms, hookworms, whipworms, giardia, and coccidia from contaminated feces — a particular concern at busy dog parks in cities like Toronto, Edmonton, and Montréal
• Bacterial infections: Salmonella, E. coli, campylobacter, and other harmful bacteria can be transmitted through feces
• Viral transmission: Parvovirus, a serious and potentially fatal disease, spreads through contaminated stool
• Chemical exposure: Dogs eating stool from other animals may be ingesting residues of medications, deworming chemicals, or toxins

Canadian winters add another wrinkle — frozen stool can persist in yards and parks for weeks or months, providing ongoing temptation and a reservoir for parasites that survive the cold.

Dietary Solutions That Actually Work

Since nutritional factors are one of the most common drivers of coprophagia, diet is one of the most effective levers you can pull.

Feed a Nutrient-Dense, Whole-Ingredient Diet

Switch from heavily processed food to a diet built on real, identifiable ingredients. Fresh proteins, wholesome vegetables, and balanced fats provide bioavailable nutrition your dog's body can absorb. When your dog is genuinely nourished, the drive to seek nutrients from stool often diminishes.

Consider Digestive Enzyme Supplements

Adding a digestive enzyme supplement to your dog's meals can improve nutrient absorption and reduce undigested material in stool. Look for products containing protease, amylase, lipase, and cellulase.

Add Probiotics

A healthy gut microbiome supports efficient digestion and nutrient absorption. Probiotic supplements or probiotic-rich foods can help rebalance gut bacteria, particularly if your dog has been on antibiotics or has a history of digestive issues.

Ensure Adequate Fibre

Sufficient dietary fibre promotes healthy digestion and helps your dog feel full and satisfied after meals. Pumpkin, sweet potato, and green beans are excellent whole-food fibre sources that most dogs enjoy.

Check for Vitamin B Deficiency

Some research suggests that dogs with coprophagia may be deficient in B vitamins. A diet rich in quality animal proteins naturally provides B vitamins, but a supplement may be warranted if your vet identifies a deficiency.

Training and Management Strategies

Diet is half the equation. Training and environmental management are the other half.

• Clean up immediately: The simplest prevention is removing the opportunity. Pick up stool from your yard right away — in winter, do a thorough yard sweep as snow melts in spring
• Teach a solid "leave it" command: This is one of the most valuable commands for any dog. Practice with high-value rewards so your dog learns that leaving stool alone earns something much better
• Supervise outdoor time: Until the behaviour is resolved, don't leave your dog unsupervised in areas where stool is accessible
• Increase exercise and enrichment: More walks, puzzle toys, training sessions, and interactive play can address the boredom component. Even a 15-minute sniff walk through your neighbourhood provides valuable mental stimulation
• Avoid punishment: Scolding or punishing your dog for eating stool can increase stress — which can actually worsen the behaviour. Stay calm and redirect instead
• Use taste deterrents cautiously: Products designed to make stool taste unpleasant (added to the dog's food) work for some dogs but not all. They address the symptom, not the cause, so they're best used alongside dietary and behavioural changes

When to Consult Your Veterinarian

Schedule a vet visit if:

• The coprophagia is new or has suddenly increased in frequency
• Your dog is losing weight despite eating normal amounts
• There are accompanying signs like diarrhea, vomiting, or changes in stool quality
• You suspect your dog may have ingested feces from a sick animal
• Home dietary and training interventions haven't improved the behaviour after four to six weeks

Your vet can run fecal tests, bloodwork, and pancreatic function tests to rule out underlying medical causes.

A Behaviour With a Solution

Coprophagia is unpleasant, but it's rarely mysterious. In most cases, it comes down to nutrition, boredom, or both. Address those root causes — with a nutrient-rich diet, adequate exercise, and consistent training — and the behaviour usually improves dramatically.

At Alqo, we formulate our meals to be nutritionally complete and highly digestible, made from real ingredients your dog's body can actually use. When every bite delivers genuine nourishment, your dog's body has less reason to go looking for it elsewhere.