A cat poop color chart reveals critical health signals: brown indicates normal digestion; black or tarry suggests upper GI bleeding requiring immediate veterinary attention; orange points to liver or bile issues; green indicates diet changes or bile excess. A litter box camera such as LitterLens records stool color and shape for each cat, so you can spot a change and call your vet early.
See the LitterLens litter box health camera for tracking stool color, shape and litter box visits.
Why Is Cat Poop Color a Key Health Indicator?
Cats are masters of hiding illness, often showing no symptoms until serious conditions have progressed significantly. Stool color changes serve as early warning signals—black tarry stool may indicate internal bleeding, while orange poop can signal liver dysfunction. Checking poop color consistently helps you notice these changes sooner. For multi-cat households, color tracking becomes even more critical, as health changes in one cat can easily go unnoticed. LitterLens saves a stool image for each cat and, with a Care+ subscription, alerts you when a stool looks abnormal.
What Does Brown Cat Poop Mean on the Color Chart?
Normal brown stool in segmented, firm pellets signals healthy digestion and proper hydration. This is the ideal baseline for comparing against other colors. Light or dark brown variations typically reflect minor diet shifts and are generally not concerning. With a Care+ subscription, LitterLens keeps abnormal stool records and analysis for 12 months, and it builds a baseline for each cat over about a week (settling in around 30 days), so you can see when that cat’s normal shifts. The guide to healthy cat stool shows what a normal stool looks like.
| Poop Color | Possible Meaning | When to Worry | What LitterLens Records |
|---|---|---|---|
| Brown | Normal digestion | Rarely concerning | Baseline reference; tracks stool shape and frequency |
| Black/Tarry | Digested blood (upper GI bleeding) | Immediate vet visit required | Flags the stool as abnormal (Care+ alert); stool image to show your vet |
| Orange | Liver issues, rapid digestion, bile problems | Monitor for patterns; vet if persistent | Color trend for each cat |
| Green | Bile excess, fast transit, food dyes | Monitor for infections or persistent change | Color plus visit frequency and duration |
What Causes Black Cat Poop and When to Act?
Black cat poop (melena) typically indicates digested blood from the upper gastrointestinal tract—a sign of internal bleeding requiring urgent veterinary evaluation. While less common causes include iron supplements or certain diet components, any appearance of black tarry stool warrants professional assessment. LitterLens can flag black or tarry stool as abnormal and, with Care+, send an app notification. The stool image is saved in the app, so you can show your vet what you saw. LitterLens does not diagnose anything, and only a vet can find the cause.
Why Is Orange Cat Poop a Liver Red Flag?
Orange cat poop frequently indicates liver dysfunction, rapid intestinal transit, or bile flow problems. While temporary orange stool occasionally results from diet (excess carrots or certain foods), persistent orange coloring suggests underlying metabolic issues. In multi-cat households, LitterLens recognizes individual cats (accuracy is about 80% or better, and it drops in homes with more than five cats), so each cat gets its own log. LitterLens cannot tell a diet-related color change from a liver problem. Its color history helps you describe the change to your veterinarian, and the multi-cat health monitoring collection covers homes with several cats.
Why Is My Cat's Poop Orange and What Should I Do?
Most orange or yellow-orange stool comes down to one of two things. The first is fast transit: when food moves through the gut too quickly, bile pigment doesn't have time to turn the usual brown, so the stool stays orange and is often soft or loose. Sudden diet changes, new treats, stress, and intestinal infections can all speed things up. The second is a problem with the liver, gallbladder, or bile ducts that changes how bile reaches the intestine. This is less common but more serious, and it usually comes with other signs.
Orange stool is also easy to miss. Most owners only see the stool when they scoop, litter can coat it and hide the color, and in a multi-cat home it's often unclear which cat it came from.
| Situation | What to Do |
|---|---|
| One orange stool after a food or treat change; your cat is eating and acting normally | Go back to the old food or slow down the switch, then check the next few stools. Call your vet if the color hasn't returned to brown within a day or two. |
| Orange stool that stays soft or watery for more than a day | Call your vet. Ongoing diarrhea can dehydrate a cat quickly. |
| Orange stool plus yellow gums, eyes, or ear skin, vomiting, poor appetite, or lethargy | See a vet the same day. These signs together can point to a liver problem, and cats that stop eating are at risk of fatty liver disease. |
| Orange stool in a shared litter box and you don't know which cat left it | Watch who uses the box, or separate the cats briefly, so you can tell your vet which cat is affected. |
Before the appointment, take a photo of the stool, note when you first saw the color change, and write down any recent changes in food, treats, or medications. Ask your vet whether to bring a fresh stool sample. For loose orange stool, VCA’s guide to diarrhea in cats explains the common causes.
What Does Green Cat Poop Mean for Cats?
Green cat poop typically results from bile, rapid intestinal transit, or food dyes—usually diet-related but potentially signaling gastrointestinal upset. Persistent green stool may indicate infection or inflammatory bowel disease. LitterLens logs visit frequency and duration alongside stool color and shape, which gives your vet more context. It cannot tell a temporary diet effect from a health problem, so call your vet if green stool lasts more than a day or two or comes with diarrhea, vomiting, or lethargy.
For more on abnormal stool, see what sick cat poop looks like and what mucus in cat poop means.
How Can a Litter Box Camera Help With Poop Color Tracking?
Beyond static color charts, LitterLens offers image-based analysis of what your cat leaves in the box. It uses AI vision to analyze stool shape (hard pellets, pudding-soft, watery/diarrhea) and color (black/tarry, bright red, gray, green, orange-yellow), and it flags changes from each cat’s own baseline. Multi-cat recognition maintains separate health logs for each cat, which reduces confusion in households with multiple animals. LitterLens does not measure weight and does not detect kidney disease, urinary tract infections, bladder stones, vomiting, or parasites.
The system operates wirelessly with a 5000 mAh battery that lasts about a month with typical use. It mounts on a flat surface of a litter box larger than size L (over 50 × 38 cm) and is not recommended for automatic or self-cleaning litter boxes. The SiiPet Care+ app provides tiered access: the free plan includes live view, recording, visit counts and duration, 72 hours of local storage, and low-battery alerts. Abnormal stool alerts and analysis need a Care+ subscription, priced at $5.9, $9.9 or $12.9 a month depending on the number of devices, which also adds one month of cloud event video. LitterLens is informational and does not diagnose, so talk to your vet about anything it flags.
Which Cats Benefit Most from Poop Color Monitoring?
Multi-cat households gain the most, since a per-cat log shows which cat is having stool changes. For homes with two cats, the LitterLens two-pack covers both litter boxes, and our guide on finding which cat is sick has more ideas. Senior cats and those in recovery from urinary or digestive issues may benefit from continuous monitoring. Pet owners seeking data-driven insights to share with veterinarians, rather than relying on memory or observation, may find LitterLens useful.
How Accurate Is LitterLens for Stool Color Detection?
LitterLens image analysis examines stool color, separating normal brown variations from changes such as black tarry stool or orange discoloration. Siipet does not publish a verified accuracy rate for this, so treat every flag as a prompt to look at the stool yourself and, if needed, call your vet. Image analysis works best when the litter box is in good light and the camera view is clear.
For multi-cat homes, individual cat recognition is about 80% or better and drops in homes with more than five cats, so check the log against what you see when you scoop.
Can You Share LitterLens Stool Data with Your Veterinarian?
Yes. LitterLens stores health-related records in the SiiPet Care+ app, including timestamped stool images, stool quality analysis, color flags, and alert logs for in-app review during veterinary consultations. This information supports observation and discussion, but it is not a diagnosis. Longer abnormal records and analysis history are available in-app with a Care+ subscription.
Conclusion: Use the Chart, Then Call Your Vet
Understanding your cat's poop color chart is fundamental to preventive health management. By recognizing that brown represents normal digestion while black suggests internal bleeding, orange points to liver concerns, and green indicates bile or transit issues, you gain the ability to catch health problems early. Observation by eye can still miss changes, especially in multi-cat households where it is hard to know which cat left which stool.
A litter box camera can make that observation easier. LitterLens analyzes stool color, shape, and frequency patterns for each cat. With a Care+ subscription, app alerts notify you of abnormal stools, stool images provide visual documentation, and the 12-month record of abnormal stools shows emerging trends. Whether you have multiple cats, a senior feline, or a cat in recovery from urinary or digestive issues, the record gives you something concrete to share with your vet. LitterLens does not diagnose, so any flag, or any black, red, or persistently abnormal stool, is a reason to call your veterinarian.
FAQs About Cat Poop Color
What does black cat poop mean?
Black or tarry stool (melena) indicates digested blood from the upper gastrointestinal tract, suggesting internal bleeding. This requires immediate veterinary attention. LitterLens can flag black stool as abnormal (alerts need Care+), but call your vet as soon as you see it and do not wait for an alert.
Is orange cat poop always serious?
Orange stool often signals liver or bile issues but occasionally reflects temporary diet changes like excessive carrot consumption. With Care+, LitterLens keeps abnormal stool records for 12 months, which helps you describe the pattern to your vet. Persistent orange coloring warrants veterinary investigation.
When should I take my cat to the vet for orange poop?
Go the same day if orange stool comes with yellow gums or eyes, vomiting, poor appetite, or lethargy. If your cat seems well otherwise, call your vet when the orange color or loose stool lasts more than a day or two.
How does LitterLens handle multiple cats' poop colors?
LitterLens recognizes each cat individually (about 80% or better accuracy, lower in homes with more than five cats) and keeps a separate log of stool color and visits for each one.
Can I share LitterLens stool analysis with my vet?
Yes. The SiiPet Care+ app stores stool images, color flags, and visit data that you can show your vet during a consultation. Only your vet can make a diagnosis.
Is LitterLens a medical diagnosis tool?
No. LitterLens provides health insights for informational purposes only and is not a medical diagnosis. All findings should be discussed with a licensed veterinarian.
