Cat poop smell can come from diet, parasites, or digestive problems. See a vet if it is new or severe.
Common causes
- Diet: high protein or low quality food.
- Parasites (worms, giardia).
- Bacterial overgrowth.
- Food intolerance.
- Digestive disease.
- Stress.
What to do
Change foods slowly.
See a vet
If the smell is new, with diarrhea, mucus, blood or weight loss.
Test
Bring a stool sample.
Prevention
Keep up with deworming.
Why stool smells strong
Cat feces smell comes from protein breakdown by gut bacteria, producing sulfur compounds, skatole and indole. A high-protein diet makes smell stronger. A sudden change to a very strong odor can point to diet changes, parasites, infection or malabsorption.
- Giardia, coccidia and roundworms commonly cause foul loose stool, especially in kittens.
- Pancreatic insufficiency and inflammatory bowel disease cause greasy, foul stool.
- Poor-quality food with fillers or food intolerance can raise odor.
- Antibiotics can disturb gut flora.
What to do
Switch foods gradually over 7 to 10 days, ensure the cat is dewormed, and bring a fresh stool sample (within 12 hours) to a vet for fecal tests. See a vet if there is diarrhea over 24 to 48 hours, blood or mucus, vomiting, weight loss or lethargy. Scoop the litter daily and use unscented clumping litter. Probiotics designed for cats may help under vet guidance.
Why stool smells strong
Cat stool smell is influenced by diet high in protein, and by sulfur compounds from digestion. Foul odor can result from diarrhea, parasites, food intolerance, infection, or poor food quality.
What to do
Change litter regularly, switch to a quality diet gradually, and see a vet if odor comes with diarrhea, blood or weight loss. Fecal tests detect parasites.
Digestive causes of strong odor
Cat stool smell is produced by bacteria breaking down protein, creating sulfur compounds. Low quality foods with high plant fillers or poor digestibility make stool larger and smellier. Intestinal parasites like Giardia and Tritrichomonas produce foul, soft stool. Food intolerance and inflammatory bowel disease cause smelly stool too.
Management steps
Choose a high protein, highly digestible diet, transition foods over 7 to 10 days, and add probiotics such as FortiFlora if vet suggested. Collect a stool sample for testing. Scoop litter daily and replace litter weekly. Contact a vet for black, bloody or mucousy stool, or diarrhea lasting beyond 48 hours.
Based on data from Cornell Feline Health Center and the American Association of Feline Practitioners
