Why Do Dogs Eat Poop? (Coprophagia Causes & How to Stop It)

Coprophagia — eating faeces — is common, usually curable, and more often behavioural than medical. Around one in four dogs has been seen doing it, and it rarely means anything is wrong with your dog.

The Short Answer

Eating faeces is common enough that VCA describes most cases as purely behavioural, while insisting medical causes be ruled out first. A UC Davis survey led by Dr. Benjamin Hart and presented to the American Veterinary Society of Animal Behavior, as reported by the AKC, found 16% of dogs were serious stool eaters and 24% had been seen doing it at least once. In puppies it usually fades before about nine months. The practical path is: clean up promptly, rule out medical causes with a vet, then work on the behavioural triggers. It is worth defusing the stigma around it — both sources stress it is common, often instinctive and usually curable, not a sign of a neglectful home.

Why It Happens

• Behavioural: puppy exploration. Puppies explore with their mouths and may mimic their mother, who eats puppies' stool for roughly the first three weeks to keep the den clean.
• Behavioural: attention and punishment. The behaviour is strongly reinforced by owner reaction, and harsh punishment during house training teaches the dog to eat the evidence — producing a vicious cycle rather than a cure.
• Behavioural: environment. Isolation and kennel confinement, anxiety, living with a sick or elderly dog, feeding areas too close to toilet areas, and the smell of faeces on the mother's breath can all contribute.
• Medical: nutrient and digestion. VCA lists a poorly digestible diet, underfeeding or extreme calorie restriction, digestive enzyme deficiencies, and malabsorption as contributors — anything that decreases nutrient absorption or increases stool appeal.
• Medical: parasites and increased appetite. Parasites are the minimum workup, VCA states; conditions that raise appetite such as diabetes, Cushing's disease, thyroid disease and steroid treatment can also drive it.

What the Sources Actually Say

This article paraphrases two verified sources. VCA Animal Hospitals' coprophagia page is written by board-certified veterinary behaviourists Dr. Debra Horwitz and Dr. Gary Landsberg, and it is where the medical-versus-behavioural split, the minimum stool testing, and the stop-strategies come from. The American Kennel Club's article reports the UC Davis survey — led by Dr. Benjamin Hart and presented to the American Veterinary Society of Animal Behavior — which recorded that 16% of dogs were "serious" stool eaters (caught in the act five or more times) and 24% were seen doing it at least once, with Hart concluding that fresh-stool eating reflects an ancestral instinct that protected the den from parasites. We describe the survey as AKC reports it, not as a peer-reviewed study, because it was presented at a conference.

One honest note on the same survey's details, as reported: the behaviour is more common in multi-dog households (33% in three-dog homes versus 20% in single-dog homes), more common in females, 92% of affected dogs prefer fresh stool one to two days old, and 85% will not eat their own faeces.

What You Can Do

1. Clean up promptly and prevent accessPick up stool immediately and keep the yard and the cat litter box managed. Supervision and a leash in the garden are the practical half of every strategy below.
2. Rule out medical causes firstVCA is explicit that a medical problem must be excluded before calling coprophagia behavioural, and that the minimum workup is a stool check for parasites. Soft or poorly digested stool warrants further stool or blood tests.
3. Rebuild the mealtime patternFor an adult dog, ask the vet about diet: a more digestible formula, a different protein, or a high-bulk, high-fibre option for calorie-restricted dogs.
4. Train the handoverTeach the dog to come and sit for a treat right after eliminating, so the reward replaces the stool. Pair it with a firm interrupting cue and reliable "leave it" and "come".
5. Skip the disproven shortcutsVCA is blunt: taste-aversion sprays are unreliable because dogs develop tolerance, and papaya, yoghurt and mints have never been proven effective. The only consistently effective taste aversion in experiments was something that induced nausea — which is not a home remedy.

When to See a Vet

Related Reading

• Best automatic feeders for picky cats — the same portion-scheduled feeding logic applies to dogs whose coprophagia relates to hunger
• Best pet cameras — useful for confirming what happens in the garden when you are not watching
• Why is my dog panting so much? — another behaviour that is usually normal but has specific emergency causes