Orange poop in cats usually comes from something your cat ate, but it can also signal a problem with bile processing, the liver, or the gallbladder. Normal cat stool is medium to dark brown because of stercobilin, a pigment created when bile breaks down in the intestines. When something disrupts that process, or when certain foods or additives pass through, the color shifts toward orange or yellowish-orange.
How Bile Gives Poop Its Color
Your cat’s liver produces bile, a greenish-yellow fluid that gets stored in the gallbladder and released into the small intestine during digestion. As bile moves through the digestive tract, bacteria transform it into stercobilin, the brown pigment that gives stool its typical color. If bile flow is reduced or blocked, less of that brown pigment forms, and stool can appear orange, pale yellow, or even clay-colored (sometimes called acholic feces).
A partial blockage of the bile duct is one explanation for orange stool specifically. A complete blockage tends to produce very pale, grayish feces within about a week. But a partial obstruction lets some bile through, creating that in-between orange shade. Bile duct problems can stem from inflammation, gallstones, pancreatic swelling pressing on the duct, or in some cases tumors.
Dietary Causes
The most common and least worrying explanation is food. Carrots, sweet potatoes, pumpkin, and squash all contain pigments that can tint stool orange if your cat eats enough of them. Some commercial cat foods and treats include these ingredients, and a new food or a sudden diet change is often the simplest reason for a color shift. Artificial colorings in cheaper foods can do the same thing.
If you recently switched your cat’s food or introduced a new treat, that’s the first thing to consider. Try going back to the previous diet for a few days. If the stool returns to brown, you have your answer.
Liver and Gallbladder Problems
When the issue isn’t dietary, the liver and gallbladder are the next place to look. Liver disease, hepatitis, or gallbladder inflammation can all reduce bile output and produce orange stool. These conditions often come with other visible signs: yellowing of the skin inside the ears, the gums, or the whites of the eyes (jaundice). Jaundice is a clear signal that bilirubin, a component of bile, is building up in the bloodstream instead of reaching the intestines.
Cats with liver or gallbladder disease may also lose their appetite, become unusually lethargic, vomit, or lose weight over days to weeks. Orange stool paired with jaundice warrants an immediate vet visit, as it points to significant liver dysfunction or bile duct obstruction.
Digestive Speed and Malabsorption
When food moves through the intestines faster than normal, bile doesn’t have enough time to fully break down into its brown form. The result is stool that looks orange, yellow-orange, or greenish. This is common during episodes of diarrhea from any cause: stress, dietary indiscretion, infection, or inflammatory bowel disease.
Exocrine pancreatic insufficiency, a condition where the pancreas doesn’t produce enough digestive enzymes, can also cause orange or yellowish, greasy-looking stool. Cats with this condition often eat normally or even more than usual but still lose weight because they can’t properly absorb nutrients. The undigested fat in the stool gives it a lighter color and an oily appearance.
Intestinal Parasites and Infections
Parasites like coccidia and Giardia can irritate and damage the intestinal lining, causing diarrhea that may appear orange or contain mucus. Coccidia infections are especially common in kittens, where the parasites can destroy enough of the intestinal lining to cause mucus-heavy diarrhea. Adult cats with healthy immune systems often carry these organisms without obvious symptoms, but kittens or immunocompromised cats can develop significant digestive upset.
Other signs of parasitic infection include a dull coat, vomiting, bloating, and pale gums. The stool color change in these cases comes more from inflammation and rapid transit time than from a specific pigment the parasites produce.
What Your Vet Will Check
If the orange stool doesn’t resolve within a day or two, or if your cat seems unwell, a vet will typically start with blood work and a fecal exam. The blood panel checks liver enzyme levels and bilirubin, which reveal whether the liver or bile ducts are involved. A fecal flotation test screens for common parasites, and specialized tests can detect Giardia and other organisms that standard flotation might miss.
If blood work points to a liver or gallbladder problem, abdominal ultrasound is the next step. Ultrasound can reveal bile duct blockages, masses, thickened intestinal walls, and enlarged lymph nodes. In some cases, the vet can use ultrasound guidance to take a tissue sample without surgery. For suspected pancreatic insufficiency, a specific blood test measuring digestive enzyme levels confirms the diagnosis.
Signs That Need Urgent Attention
A single orange bowel movement in a cat that’s eating, playing, and acting normally is rarely an emergency. But orange stool lasting more than one to two days deserves a closer look, even without other symptoms. Seek veterinary care promptly if you notice any of these alongside the color change:
- Jaundice: yellow tinge to the gums, ear skin, or eyes
- Vomiting or diarrhea lasting more than 24 hours
- Loss of appetite or refusal to eat
- Significant lethargy: sleeping more than usual, reluctance to move
- Weight loss over days or weeks
Jaundice combined with orange or pale stool is the most urgent combination, as it strongly suggests liver disease or bile duct obstruction that needs treatment quickly to prevent further damage.