Pet Health
· Updated March 04, 2026· 5 min read

How to Identify Abnormal Cat Poop in the Litter Box

✓ Vet-Reviewed Content
Vetnique Team
Written by Vetnique Team
Dr. James Bascharon
Reviewed by Dr. James Bascharon, DVMGeneral Practice
Last medically reviewed: March 04, 2026
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- Normal cat poop should be brown to dark brown, sausage-shaped with smooth edges, firm yet malleable, and free of blood or mucus
- White specks in cat poop may indicate intestinal parasites, green stool can signal gallbladder or bacterial issues, black or tarry stool may indicate internal bleeding in the upper digestive tract, and red in the stool can indicate blood in the lower digestive tract
- Yellow cat poop may point to a liver or gallbladder issue, though it can also result from temporary digestive upset that resolves on its own
- Contact your veterinarian if you notice constipation lasting more than 24 to 48 hours, signs of straining or pain, bloody stool (red or black), white poop, or green stool
- Supporting your cat's digestive health includes providing adequate dietary fiber, ensuring proper hydration (multiple water bowls, wet food), and encouraging regular physical activity
- Introduce new foods gradually over one to two weeks to allow your cat's digestive system to adjust and to watch for signs of food sensitivities

Cats can be sneaky with their bowel movements; they slink away and quietly do their business in a tucked-away litter box, then reappear as if nothing ever happened. 

Taking an “out of sight, out of mind” approach is what most cat parents prefer when thinking about their cat's poops; we check a few times a day for messes that need cleaning up, but otherwise would rather not take too close a look at what’s left nestled atop the kitty litter. 

A closer look at your cat’s poop will give you valuable insight into what’s happening inside your cat’s body. So what does your cat’s poop say about their health? Learn what color says about your feline’s digestive health and what you can do to keep them on the right track!

White cat poop & other troublesome cat poop hues

You'll first notice the stool's color when digging for buried treasure in your cat’s litter box–because we all know how much they love burying their poop. Normal cat poop should be a brown to dark brown color. If their stool takes on an abnormal hue, make a note and contact your vet.

White cat poop

Cat poop with white specks could be a sign of intestinal parasites, which require diagnosis and treatment from your veterinarian. 

Green cat poop

Gallbladder issues are the most common cause of greenish cat poop, but poop that’s runny with a yellow-green hue could also indicate a bacterial or digestive issue.

Black cat poop

Brown to dark brown are considered healthy cat poop colors––but be sure that dark brown isn’t black. Black, tarry stool is a sign that internal bleeding could be happening somewhere higher up in the digestive tract.

Red cat poop

If you see red in your cat’s poop, it could indicate the presence of blood in the lower digestive tract or, in rare cases, result from red-colored food that was ingested and then digested.

Yellow cat poop

Yellow cat poop isn’t always a cause for concern. On the one hand, yellow-hued stool could point to a liver or gallbladder issue. On the other, it could be run-of-the-mill digestive upset that could dissipate on its own––if it doesn’t, contact your vet to explore other possible causes.

Cat owner scooping up cat poop from inside a litter box

What does normal cat poop look like?

When checking your cat’s litter box, a healthy bowel movement should have these five hallmark characteristics: 

Smooth edges

A stool with smooth edges means the food has been effectively digested and has moved smoothly through the digestive tract. A lumpy stool could signify constipation, while a watery stool with ragged edges could mean cat diarrhea.

Sausage shape

A long, log or sausage-shaped stool that mimics the natural shape of the digestive tract is what you want to see when you look in your cat’s litter box. Stool that appears as small, pebble-like pieces could mean your cat’s stool is too dry, linked to dehydration and constipation.

Brown color

As your cat’s digested food moves through its digestive tract, the combination of stomach bile and enzymes alters the color of the stool to a healthy brown color. 

Firm & malleable

The ideal texture for your cat’s stool is a firm–yet still malleable–texture that doesn’t fall apart when you scoop it up. 

No blood or mucus

For obvious reasons, you don’t want to see any blood in your cat’s poop. Blood can indicate injury in the digestive system or from straining due to constipation. Some mucus can be a normal byproduct of lubrication from the intestines, but excessive mucus isn’t normal and should be discussed with your veterinarian.

When should I worry about my cat’s poop?

Keeping on top of your feline’s bowel behaviors can be tricky. Cats usually poop once or twice a day, so take notes if you notice anything unusual. Keep track of the timing and characteristics of bowel movements and other accompanying behaviors or symptoms you think could be connected. 

If you notice any of these symptoms, make a note and contact your veterinarian for ways to help your cat’s poops get back on track: 

  • Constipation lasting more than 24-48 hours
  • Signs of straining, pain, or discomfort while pooping
  • Red or black bloody stool
  • Cat or kitten with white poop 
  • Cat pooping green stool

How to support your cat’s digestive health

So you want to support your cat’s digestive health–and get their poops back to normal–but where should you start? A blend of supplements and lifestyle habits can get them back on track! 

First, do what you can to ensure they’re getting enough dietary fiber in their food. That could mean adding a fiber sprinkle for wet or dry cat food or switching to more nutritious food. Remember to introduce foods over a week or two, allowing your cat’s digestive system to adjust while watching for signs of food sensitivities.

Hydration is vital for keeping things moving in the digestive system! You can increase your cat’s water intake by adding multiple bowls of clean water around the house, which can encourage more daily drinking. Wet food is another excellent way to sneak water into their diet! 

Healthy activity is a must for keeping your cat on a regular pooping schedule! Catnip toys, laser pointers, and climbing cat trees are just a few options for indoor cats who don’t get as much exercise as outdoor cats.


If you’re worried about your cat’s abnormal poops, don’t hesitate to tap your veterinarian for help! Depending on what’s causing the symptoms, your vet might prescribe a specific medication like Metronidazole (Flagyl) for cat diarrhea or Panacur (fenbendazole) for parasitic infections. If they suspect an allergen is to blame, they’ll help you outline a special diet that can help rule out the offending foods. 

Breeds commonly affected
Most at risk

Frequently Asked Questions

What does normal cat poop look like?

Healthy cat poop should be brown to dark brown in color, sausage or log-shaped with smooth edges, and firm yet malleable enough that it holds its shape when scooped. It should not contain visible blood or excessive mucus. The brown color results from the combination of stomach bile and enzymes that process food as it moves through the digestive tract.

What does the color of my cat's poop mean?

White specks in cat poop may indicate intestinal parasites. Green stool can signal gallbladder issues or a bacterial or digestive problem. Black or tarry stool may indicate internal bleeding somewhere higher in the digestive tract. Red in the stool can indicate blood in the lower digestive tract. Yellow stool may point to a liver or gallbladder issue, though it can also result from temporary digestive upset. Normal cat poop should be brown to dark brown.

When should I worry about my cat's poop?

Contact your veterinarian if you notice constipation lasting more than 24 to 48 hours, signs of straining, pain, or discomfort while your cat is using the litter box, red or black bloody stool, white poop, or green stool. Cats typically poop once or twice a day, so keeping track of the timing, appearance, and any accompanying symptoms can help your veterinarian identify the issue.

How can I support my cat's digestive health?

Ensure your cat gets adequate dietary fiber, either through their food or with a fiber supplement. Keep multiple bowls of clean water available around the house and consider incorporating wet food to increase hydration. Encourage regular physical activity with toys and climbing structures. Introduce any new foods gradually over one to two weeks to give the digestive system time to adjust. If digestive problems persist, consult your veterinarian.

Why does my cat have diarrhea?

Cat diarrhea can result from a variety of causes including dietary changes, food sensitivities or allergies, bacterial or digestive issues, parasitic infections, or stress. If diarrhea persists, your veterinarian may prescribe specific medications or recommend an elimination diet to identify the cause. Adding a fiber supplement and probiotic to your cat's routine can also help support healthy bowel movements.

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Veterinary Disclaimer

This article was reviewed by Dr. James Bascharon, DVM.Vetnique Labs was founded by Dr. James Bascharon, DVM, and all content is reviewed by our Vet Advisory Board. This information is not a substitute for professional veterinary advice. Always consult your veterinarian.

Vetnique Team
About the Author

Vetnique Team

The pet health and wellness team at Vetnique. Backed by veterinary science and dedicated to helping pet parents keep their dogs and cats happy and healthy.

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