Why Do Dogs Eat Poop? Rule Out Medical Causes First
Coprophagia is common. VCA says rule out parasites and malabsorption first. Why puppies do it, adult new onset, and what actually helps.
Dogs do eat feces. The name is coprophagia. It is common. VCA says most cases look behavioral, but medical causes must be ruled out first. A stool test is the minimum, not a scolding and a pineapple recipe.
PetMD groups the reasons as instinct, curiosity, anxiety, medical problems, and attention. Punishment makes the problem worse. Pick the stool up, teach drop it and leave it, and book the exam before you call it “just a habit.”
Who. Dr. Janet Greenfield, BVMS, CVA, CERP, Veterinarian of Animals. How. VCA’s coprophagia behavior page (Horwitz and Landsberg), VCA’s puppy poop-eating page, AKC’s owner explainer, and PetMD’s behavior summary, including the 2018 Hart et al. Veterinary Medicine and Science survey they cite. Why. Owners treat this as a disgusting habit first. The useful order is a medical rule-out, then cleanup and training, not a pantry recipe.
Medical causes to rule out first
Anything that cuts nutrient absorption, upsets the gut, or makes stool more appealing can drive coprophagia. VCA names a poorly digestible diet, underfeeding, enzyme deficiencies or other malabsorption, and parasites. Stools that still hold a lot of undigested food are more likely to get eaten.
VIN Veterinary Partner adds homemade diets (more likely unbalanced), parasites, pancreatic issues, anxiety or boredom, and hiding accidents. That homemade-diet line is a reason to say what is in the bowl, not a reason to invent a supplement stack from a comment thread.
| What to check | Why sources name it |
|---|---|
| Stool parasites | VCA: minimum testing before a purely behavioral label |
| Diet and calories | Poorly digestible food, underfeeding, or extreme calorie restriction |
| Malabsorption / enzymes / pancreas | VCA, AKC, and VIN: food left in the stool is more appealing |
| The other dog’s stool | VCA: that other dog may need testing for poor digestion |
| Homemade diet | VIN Veterinary Partner: more likely to be unbalanced |
If a dog prefers one housemate’s stool, do not assume it is a taste quirk. VCA says that other dog may be the one who needs the workup.
Why puppies do it
VCA says coprophagia is a common puppy problem that usually clears by adulthood with good nutrition, direction, and supervision. Left alone, puppies investigate, play with, and eat stools. Owner attention can pay for a repeat.
There is also a nest story. A dam cleans puppies and eats their excrement. Puppies may copy her or copy playmates. AKC summarizes a further idea from some researchers, “appetitive inoculation”: fecal odor on the mother’s breath, or regurgitated food mixed with puppy fecal matter, may set a taste association. That is a theory AKC reports, not a lab result we will dress up as settled science.
PetMD and VCA’s puppy page both point to Hart, Hart, Thigpen et al. (2018) in Veterinary Medicine and Science: an inherited pattern from wolves eating fresh stool (less than two days old) to keep a den clearer of fecal-borne parasites. VCA’s puppy page cites that paper as 16% serious poop eaters and 23% at least once.
AKC’s practical line for puppies: eating their own stool is not the same risk as eating another animal’s stool. Other animals’ feces can carry parasites, viruses, or toxins. Cleanup still matters either way.
Adult new onset
When an adult starts eating stools, VCA names malabsorption, dietary gaps, diabetes, Cushing’s, thyroid disease, steroids, and extreme calorie restriction. AKC repeats that list and tells you to see a veterinarian to rule those problems out.
Behavior still belongs on the same visit. AKC says dogs kept alone in kennels or basements are more likely to eat poop than dogs who live close to people. Crowded shelters show the same pattern. Harsh house-training builds a cycle: the dog eats the evidence, then gets punished more. Attention works the other way too. AKC’s instruction is not to overreact.
Two household details AKC flags: feed away from the potty area, so food odor and feces do not get paired. And a healthy dog may eat stool from an incontinent housemate. Scientists hypothesize a pack-clean instinct against predators. Hypothesis is the word they use. It is not a reason to leave piles down.
PetMD is the same order in shorter language: if an adult who never did this starts, and you also see weight loss, lethargy, discomfort, behavior change, vomiting, or diarrhea, make the appointment. Do not wait for a second season of “maybe it is boredom.”
What actually helps
VCA’s treatment start is blunt: prevent access, clean the property, and supervise outdoors. Time the walk, wait for the stool, call the dog in for a reward, and bag the pile before you leave the dog alone. Teach come and sit after elimination so the new habit is “look at me,” not “check the ground.”
- Book the exam. Ask for at least a stool test. Say if the diet is homemade or heavily restricted.
- Pick up stool immediately, yard and walk. No pile left as a snack.
- Supervise outdoor time. Interrupt sniffing at a pile with a cue, not a chase-and-scream scene.
- Teach drop it and leave it, then pay well when the dog comes away.
- Add enrichment: more time with you, more to do when confined. Boredom and anxiety are on VIN’s list.
- Keep the litter box out of reach if a cat lives in the house. Cat feces are a common second target.
VCA’s puppy page says commercial deterrents are safe to try and may help only a small share of dogs. Use them as a maybe, not as the plan.
| Before | After |
|---|---|
| Yell, chase, or stick the dog’s nose in it. | Punishment feeds the cycle. Interrupt, call the dog in, pick the stool up. |
| Leave the yard for later and call it a habit. | Pick up immediately. VCA: prevent access and supervise outdoor time. |
| Order pineapple, yogurt, or a meat-tenderizer hack. | VCA: those additives are unpublished or unproven. Book the exam. Teach drop it and leave it. |
What does not help
Punishment is the move that looks like leadership and trains the opposite. AKC’s house-training cycle is eat the evidence, then get punished more. PetMD: never punish for accidents. VCA still calls the old “stick the nose in it” method inhumane and useless, and says it may encourage more stool eating.
We will not publish a homemade pineapple, papaya, yogurt, cottage cheese, Certs, or meat-tenderizer protocol as a proven fix. VCA notes those additives have been published as ideas and have never been proven. Some enzyme products are discussed as a digestion aid that might make stool less palatable. That is a clinic conversation, not a tenderizer packet on kibble tonight.
Overreacting is also a payment. AKC’s attention line is simple: do your best not to put on a show. A calm interrupt plus a bag is the whole scene.
This page is editorial. It is not a diagnosis. Read our about page for how we handle medical and behavior claims.
Questions owners ask next
Is it normal for dogs to eat poop?
Coprophagia is common. VCA treats most cases as behavioral after medical causes are ruled out. PetMD lists instinct, curiosity, anxiety, medical problems, and attention. The 2018 Hart survey, cited on VCA’s puppy page, found 16% were serious poop eaters and 23% had done it at least once. Common is not the same as harmless.
Can my dog get parasites from eating poop?
Yes. Stool from other animals can carry parasites, viruses, or toxins. AKC flags that risk for puppies eating other animals’ feces. VCA’s puppy page says other dogs’ stool can spread disease and parasites. Your own dog’s pile is a different question than a park pile. Ask for at least a stool test.
Will pineapple, papaya, or meat tenderizer stop it?
Do not treat those kitchen add-ins as proven. VCA lists papaya, yogurt, cottage cheese, and Certs as published ideas that were never shown to work. We will not invent a pineapple or meat-tenderizer protocol as a fix. Pick up stool, supervise, and see a veterinarian before you buy a pantry trick.
Why does my dog eat the other dog’s poop?
If a dog prefers another dog’s stool, VCA says that other dog may need testing. Poor digestion can leave undigested food in the stool, which is more appealing. AKC also notes a healthy dog sometimes eats stool from an incontinent housemate, a pack-clean hypothesis, not a tidy instinct you should praise.
Should I punish my dog when I catch them?
No. Punishment makes the problem worse. AKC describes a house-training cycle: the dog eats the evidence, then gets punished more. PetMD is blunt: never punish during potty training. Overreacting can also pay attention for the act. Interrupt, call the dog away, and pick the stool up.
Do store-bought poop deterrents work?
VCA’s puppy page says commercial products meant to discourage coprophagia are safe to try, but they may help only a small share of dogs. The stronger tools are immediate cleanup, supervision, and a solid drop it or leave it cue. Do not skip the veterinary exam while you wait on a chew.
When is new poop eating a vet visit?
Any new habit in an adult dog needs a medical rule-out first. VCA and AKC list malabsorption, diet gaps, diabetes, Cushing’s, thyroid disease, steroids, and calorie restriction. PetMD adds sudden onset plus weight loss, lethargy, vomiting, or diarrhea as a same-week appointment, not a wait-and-see habit.