STOOL WITH FATTY SHEEN (ADVANCED STEATORRHEA)
WHAT THIS SYMPTOM USUALLY MEANS
A shiny, greasy, or oily “film” on stool indicates advanced fat malabsorption, most commonly from exocrine pancreatic insufficiency (EPI), chronic pancreatitis, bile duct issues, or chronic GI inflammation.
This is a significant medical sign.
MOST COMMON CAUSES
MILD CAUSES
• None — fatty sheen almost always indicates disease
MEDICAL CAUSES
• Exocrine pancreatic insufficiency (EPI)
• Chronic pancreatitis
• Bile duct disease
• IBD
• Malabsorption disorders
• Dysbiosis
EMERGENCY CAUSES
• Fatty stool + weight loss
• Fatty stool + vomiting
• Fatty stool + severe diarrhea
• Extreme lethargy (advanced EPI)
RED FLAGS: WHEN THIS IS AN EMERGENCY
• Rapid weight loss
• Very foul, greasy stool
• Vomiting + fatty stool
• Pale stool accompanying fatty stool
• Senior pets with new greasy stool
AT-HOME CARE YOU CAN START NOW
• Switch to low-fat, easy-digest diet
• Hydration
• Avoid table scraps
• Add probiotics
But home care does NOT fix underlying disease.
WHAT A VETERINARIAN WILL CHECK
• TLI test (pancreatic function)
• Fecal analysis
• Bloodwork (liver/pancreas)
• Ultrasound of pancreas/liver
• Diet evaluation
MOST LIKELY DIAGNOSES
• EPI (most common)
• Chronic pancreatitis
• IBD with malabsorption
• Bile duct disease
BREEDS OR AGES AT HIGHER RISK
• German Shepherds
• Collies
• Senior pets
WHEN YOU SHOULD SCHEDULE A VETERINARY VISIT
• Within 24–72 hours
• Immediately with weight loss
EXPECTED RECOVERY TIME
• EPI: lifelong enzyme therapy
• Chronic pancreatitis: variable, lifelong management
HOW THIS SYMPTOM RELATES TO LONGEVITY
Fat malabsorption causes weight loss, immune depletion, and inflammation — major longevity threats.
WHEN TO CONSIDER A LONGEVITY CONSULT
• Chronic malabsorption
• Senior pets
• Pancreatic or liver disease