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What is Pooping Green?

An old adage says, “What goes in, must come out.” As surely as your dog eats, he will need to poop. While pet parents may take joy in walking their dogs (it does serve as a bonding experience), most people don’t actively study their dog’s stool. However, solid waste can tell you as the owner if there is something off with your dog’s gastrointestinal system. Several conditions can cause your dog to have a green-colored stool:

  • Parasite infestation
  • Something he ate
  • Rat-bait poisoning
  • Intestinal disorders

It should also be said here that puppies will have color variations in their stool as a general rule. If your puppy experiences this and he is up-to-date on vaccinations and deworming, then you likely don’t have anything to worry about if his stool is oddly colored.

Why Pooping Green Occurs in Dogs

Parasite Infestation

If parasites are present in your dog’s intestinal tract, he may have green-colored poop. It will have a slimy consistency as well. You should look for signs of constipation or straining; be prepared to document this so you can share with your vet. Giardia is a parasite that will cause your dog’s stool to be soft; in giardia, no mucus or blood will be present. Giardia can be passed between humans and dogs, so extra caution will need to be taken if you suspect giardia.

Something He Ate

While this sounds obvious, if your dog is eating a large amount of grass, his waste could come out looking green. Most of the time eating grass is harmless, but sometimes your dog is eating grass as a sign that something else is wrong. One cause for concern is pica – eating things that aren’t normally food, such as grass. Often this is not a problem; however, some dogs are eating grass because there is something nutritionally that is missing. Switching to a high-fiber dog food can help to alleviate pica. Special care should be taken that your dog does not eat grass that has been treated with herbicides or pesticides. 

Rat-Bait Poisoning

If you believe your pet has ingested rat poisoning, take him to the vet immediately. While a dog that has eaten rat bait may seem fine at first, the rat bait will take a toll on your dog’s health over time. Often, commercial rat poisons work to stop the rat’s blood from clotting, and this will soon take place in your dog’s body as well. Owners report not seeing any problems in their dogs for days or weeks after the initial ingestion. Once your dog’s reserve of clotting factor is gone, he will start to bruise easily and possibly bleeding internally. If this begins, without clotting factor, your dog may die. If you believe your dog has ingested rat poison, take the box of rat poison so that your vet can tailor just the right treatment for your dog. The antidote might be as simple as Vitamin K. 

Intestinal Disorders

A number of intestinal disorders can cause your pup’s stool to become green: change in diet, inflammatory bowel disease, food allergies, idiopathic hemorrhagic gastroenteritis, small intestine bacterial overgrowth, colitis, indiscriminate eating, tumors, intestinal obstruction, viral infections, irritable bowel syndrome, or polyps. Each of these should be treated by your vet.

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What to do if your Dog is Pooping Green

If you notice a green stool in combination with eating a lot of grass, try switching your dog to a high-fiber food. One study found that a dog ate grass consistently for a number of years; once her owner switched her diet, she no longer desired grass. If you notice your dog straining or suffering from constipation and you know it has been some time since your dog has been dewormed, a trip to the vet for a fecal stool exam is in order. Green stool with no other obvious cause should still be evaluated by your vet to rule out any serious gastrointestinal issues.

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Prevention of Pooping Green

Always be cautious when putting rat bait anywhere on your property. Often curious dogs will eat a block of poison just because the block is there. Intestinal parasites can be prevented by making sure that your dog does not eat other dog’s poop. Dogs that practice pica may be bored; if so, take some time to give your dog a little more exercise.

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Cost of Pooping Green

Treating intestinal parasites in your dog can range from less than $200 to $300; the national average to treat intestinal parasites is $300. Rodenticide poisoning is very serious and the expense to eliminate the toxin and restore your pet to health may rise as high as $7500.

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Pooping Green Questions and Advice from Veterinary Professionals

Need pet health advice? Ask a vet

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Mix

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Ten Years

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Painful Urination

He has been wanting out about every 2-3 hours this time I noticed his poop waa very runny and light green but he seems to be straining

yesterday

Owner

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Dr. Michele K. DVM

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Thank you for your question. I'm not sure if he is straining to defecate or urinate, but either way, it seems that he should probably see a veterinarian. They will be able to check his urine and make sure that he is not having problems, see why he's having diarrhea and help him with that, and make sure that he is okay.

yesterday

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Pug

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Six Weeks

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Tarry Stool

Is it normal for my puppy to poop a mix of green and brown

Aug. 8, 2020

Owner

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Dr. Sara O. DVM

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1 Recommendations

Hello, This looks abnormal. I would recommend seeing your vet. Young puppies can have parasites that can cause these issues. Your vet can check a fecal sample and start your puppy on medication to help his stool return to normal. Good Luck.

Aug. 11, 2020

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Golden Retriever

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One Year

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Green, Mucus Covered, Slime-Like Stool

Hi! I took my female golden to the vet a week ago for an ultra sound because there is a possibility that she may be pregnant. It was an 80% false pregnancy but a 20% chance she might be pregnant. Since the ultra sound she has not had a solid stool and it is a jelly consistency and green. She also was around a lot of grass and may have eaten some. She has thrown up a total of 3 times the day after the vet, but the stool is the only consistent issue. Her activity level is the same and does not seem to have a decrease in appetite

July 12, 2020

Owner

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Dr. Sara O. DVM

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hello, So sorry to hear about your dog. It sounds like your dog may have gastroenteritis. It would be best for your vet to look at her and start her on medication to help her feel better. You can try to feed her a bland diet of boiled chicken and rice to see if this helps her feel better. If she does not start to feel better, it would be best for your vet to see her. I hope your dog starts to feel better soon.

July 12, 2020

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Kaya

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Blue Heeler

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18 Years

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Mild severity

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My dogs poop has been an army green color lately and nothing in her diet has changed and we don't have any grass in my yard. She's just turned 18 last month, should I be concerned??

July 29, 2018

Kaya's Owner


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3 Recommendations

Any changes in faecal colour is concerning, a change in colour to green may indicate a fast gastrointestinal transit which may be caused by infections, parasites (protozoa not worms), rat poison or another cause; since Kaya is 18 years old I would strongly recommend visiting your Veterinarian for an examination to be on the safe side. Regards Dr Callum Turner DVM

July 29, 2018

Did you go to the vet? What was it?

Sept. 21, 2018

Karin M.

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Floki

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Golden Retriever

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3 Months

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Mild severity

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Mucous

We got a golden retriever puppy a couple days ago from a local puppy store,he will be 3 months old next week. We haven't changed his food and he seems perfectly settled in at the house with no signs of stress. However his stool when he got to our house was already green but has gotten progressively more runny. The 2nd day he was home he pooped 5 times in one morning and the final one had blood in it. Then this morning before work he pooped a milky white liquid like a discharge with some blood in it. Aside from really stinky gas, an occasional gag (possibly from eating fast) he has been active, happy, and playful and I haven't noticed any signs of illness or distress. Should I be concerned?

July 2, 2018

Floki's Owner

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Green faeces may be caused by a variety of different causes including what has been eaten (grass etc…), parasites (Giardia - common in puppies), digestive issues, infections among other causes; since there are other issues with the faeces (runny and the white discharge) you should get a sample and visit a Veterinarian for a check to be on the safe side. When puppies have diarrhoea they can get dehydrated easily so it is always best to get these things checked out. Regards Dr Callum Turner DVM

July 3, 2018

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Shiloh

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Husky/Shep

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10 Years

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Serious severity

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First Urinating Now Green Diarrhea
Green Diarrhea

We have a female Husky/Sheppard cross around 10 years old. For many months she has been peeing on the carpet or downstairs in a few choice spots. She is always let out late at night or could go all day without peeing but then during the middle of the night almost every night we wake up to find a new pee spot on the carpet. I could clean the carpet with a carpet cleaner every night and have tried a variety of sparays. Now on top of this over the last three days she have dark green diarrhea several times a day all over the house. Last night I had given her anti diarrhea meds to hopefully slow or stop this. My house smells horrible even after using carpet cleaner, and we also put bleach and floor cleaner in mop bucket. Please help what could it be,should we be concerned about more serious health problems with both urinating and now diarrhea.

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Blu

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Blue Heeler

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3 Months

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Vomiting
Not Eating
Bloody Runny Stool
Greenpoop
Sad Puppy

So we a 3 month old Puppy name Blu; he is not doing well at all! We been fighting and fighting and trying to figure out what is going on. He had one session of diaheria bloody as it can be and found a worm! After we were at the vet. He is lethargic as he can be I been giving him fluids and injected fluids through his IV as well. He hasn’t eaten for almost 5 days. We successfully for green diaheria and I wonder if that is good? He still won’t eat but he will drink water. And I have no idea if the dr de wormed him at all! Should I still be concerned or relieved that it went from bloody to green? Dr doesn’t know what’s wrong with him.... blood work shows no white cell count and proteins are very low and in general low. I don’t know what is killing my puppy... I also have the sister and she had a bowel obstruction she is doing a lot better but doesn’t have what he has of yet. Please help! Home remedies? Anything I could do make him comfortable? Or help him pass this?

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Boston

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Maltipoo

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3 Months

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Green Poop

I have a 3 month old maltipoo pup. Just noticed this morning that his poop is green and brown in the other end. He stays indoor and don’t eat grass. Should I be bothered?

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Rambo

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Indian pariah

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2 Months

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Fair severity

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Soft Army Green Coloured Stool

My 48 days old puppy is having soft army green coloured stool with a few white coloured worms in it ever since we got him deworming medicine. Otherwise his hunger, behaviour etc everything is normal. He doesn't poop everyday. It's usually with a gap of 2days. What should I do?

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Drago

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Doberman Pinscher

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14 Months

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Moderate severity

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Moderate severity

Has Symptoms

Hair Loss
Soft Stool
Green Poop

Drago was diagnosed with Giardia and was placed on antibiotic treatment (Panacur). We treated him twice because the vet mentioned that sometimes it doesn’t get cured right away. The antibiotic didn’t work, and the dog is still pooping green/soft stool. We even changed his food to prescribed Royal Canin hypoallergenic food and he still has upset stomach. Going to seek a second opinion at this point. I don’t know if he still has the parasite or if he has another condition...we did 12 days of the Panacur. Can’t imagine what the problem is. Also, his coat is flaky and loosing hair. Help!!!

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