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Why is my cat pooping outside the litter box and running away?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 1 year and 7 months old | 14 lbs

My cat recently has randomly been freaking out, running around, and pooping around the house. He will sometimes start pooping in his litter box but then sprint out before he's done so he gets some on the floor. I have taken him to the vet and they said he isn't constipated, doesn't have mega colon, and looks completely healthy. How can I stop him from pooping around the house/running out of his box?

5 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on May 5th, 2017

Poor Bear! If this behavior is usually triggered by pooping, it's likely that he has some type of pain or discomfort when he defecates - some possibilities would include an anal gland infection, hip or spinal arthritis, inflammatory bowel disease, or some other medical problem. I'm not sure what kind of testing has been done so far, but I would definitely suggest blood work and x-rays at a minimum to help identify any potential problems that could be causing discomfort. Your veterinarian can also check his anal glands to see if they are overly full or infected. A trial course of pain medication might also be helpful to see if this improves the behavior. I would suggest talking with your veterinarian about these options, or seeking a second opinion from another vet in your area if needed.

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Related Answers from Veterinarians

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    Answered By Dr. Elizabeth

    Veterinarian

    Published on May 21st, 2019

    Pooping outside the litter box can be related to pain when having a bowel movement or a behavioral condition. The most important thing is to have your cat examined by the veterinarian for signs of discomfort. Make sure to bring in a fresh stool sample so the doctor can examined the firmness, moisture content and check for parasites. Sometimes these cats need a higher fiber diet and additional water (like canned food). A dry stool, parasites or constipation issues will cause pain and avoidance of the litter box. Here is a good article to explain the different reasons cats will avoid the litterbox: https://www.petcoach.co/article/the-top-5-reasons-your-cat-is-avoiding-her-litter-box-and-what-to/ Make sure to clean the soiled area with a good enzymatic cleanser. This will to get rid of any smells. If the veterinarian suspects this is behavioral, there are things you can do at home to help control some stress. Here is a great article about cat's instinctual needs: https://www.petcoach.co/article/why-every-cat-needs-a-place-to-climb/ Also using a Feliway diffuser, setting aside 30 minutes a day for vigorous play for your cat or switching his food to Royal Canin Calm may help. The veterinarian can also prescribe medications which can help with house soiling and stress management. I hope this helps and please feel free to post any additional questions.

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on March 12th, 2018

    Thanks for using Petco Pet Education Center, formerly Petcoach! This usually indicates an issue with defecation. Sometimes defecating outside of the litter box can be seen with constipation for instance. Other possibilities include intestinal parasites, among others. You may start by adding 1/2 teaspoon of canned pumpkin to his meals which may improve mild cases of constipation. If no improvement, have him evaluated by your veterinarian for further assessment and treatment. Good luck and have a good night!

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    Answered By Vanessa Yeager DVM MPH

    Veterinarian

    Published on August 31st, 2017

    Hi and thanks for your question! Runny stools can have many causes- stress, parasitic infection, bacterial infection, virtual infection, or dietary indiscretion. The poop outside of the litter box tells me he may have had some discomfort while defecating and ended up defecating outside the box (associating box with painful experience). You may try adding plain canned pumpkin (not the pie filling) to his food to help firm up his stool for a few days. If he is still having this issue, you may want to take Burger in to see his veterinarian so they can run a fecal test and check for parasites and/or bacterial infection. I hope this helps! Thank you for using Petco Pet Education Center, formerly Petcoach!

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    Answered By Jennifer Summerfield, DVM CPDT-KA

    Veterinarian, Certified Dog Trainer

    Published on June 18th, 2017

    There could be a few different reasons for this. It's possible that your cat has a medical problem causing him to poop in inappropriate places, especially if his stool is loose or runny. This may also be a behavior issue caused by a litter box that isn't large enough for him, or a type of litter that isn't comfortable for digging and burying feces. In some cats, pooping outside the litter box can also be a stress-related marking behavior, although this is less common than urinating outside the box. If your cat has not been checked by a vet recently for any medical issues that could be causing this problem, this is the first thing I would suggest. Your vet can do a fecal exam and may also recommend blood work to screen for common problems that can cause this behavior. If everything comes back normal, then it's likely that you will need to address this from a behavioral standpoint. In that case, feel free to post again with more details about your litter box, where your cat tends to poop, etc. - we would be happy to try and make some more specific suggestions that may help.

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