Rabbits produce two types of droppings: hard fecal pellets and soft cecotropes — nutrient-rich cecal pellets that healthy rabbits eat directly from the anus as part of normal digestion.
When cecotropes accumulate on the fur around a rabbit's bottom rather than being consumed, it signals a health or husbandry problem — not diarrhea, but a sign that the rabbit cannot or will not eat its cecotropes.
Last reviewed: June 2026
What Are Cecotropes and Why Do Rabbits Need Them?
Cecotropes (also called "night feces," "cecal pellets," or "soft feces") are nutritionally essential droppings produced in the cecum — a large fermentation chamber in the rabbit's digestive tract — and normally eaten directly from the anus via a behavior called cecotrophy. Unlike hard fecal pellets (the round, dry droppings left in the litter box), cecotropes are grape-like clusters of soft, shiny, mucosal-coated pellets with a distinctly strong smell. They are produced primarily at night or in early morning and contain significantly higher concentrations of protein, B vitamins, volatile fatty acids, and beneficial bacteria than hard feces.
As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents, cecotrophy is not a sign of illness but a physiological requirement analogous to fermentation in the hindgut — without consuming cecotropes, rabbits would develop protein and vitamin B12 deficiency over time. A healthy rabbit consuming its cecotropes normally will never leave soft feces in the litter box; finding cecotropes on the fur, floor, or litter box consistently indicates a problem.
Why Do Cecotropes Accumulate on the Fur?
Several conditions prevent a rabbit from consuming its cecotropes normally:
Obesity: Overweight rabbits cannot physically reach their anus to eat cecotropes. This is the most common cause in pet rabbits fed excessive pellets or treats. The AEMV Pet Care Guides, 2024 identify obesity as a leading husbandry problem in pet rabbits.
Dental disease (malocclusion): Pain from molar spurs or dental abscesses can make the grooming-and-eating process painful, leading to cecotrope accumulation.
Musculoskeletal pain: Arthritis, spondylosis, or any spinal pain that limits flexibility of the lower back prevents the rabbit from reaching its hindquarters.
Excessive cecotrope production: Diets too high in carbohydrates and too low in hay fiber cause overproduction of cecotropes beyond what the rabbit can consume.
Generalized illness: Any rabbit that is sick, in pain, or severely lethargic will stop performing cecotrophy. Cecotrope accumulation in a rabbit that was previously fine is a sensitive indicator of systemic illness.
Neurological disease: E. cuniculi (Encephalitozoon cuniculi) or other neurological conditions affecting hindlimb function may impair the rabbit's ability to perform cecotrophy.
Recognizing the Problem
The key sign is finding grape-like clusters of soft, dark, shiny, strong-smelling droppings stuck to the fur around the rabbit's bottom, on the cage floor, or left in the litter box. Owners often mistake cecotrope accumulation for "mushy droppings" or "diarrhea," but true diarrhea in rabbits is liquid and odorless — a much more serious sign. Cecotropes have a distinct cluster structure and strong fermented smell. A second sign is urine scald or skin irritation around the hindquarters from accumulated moisture.
As described in Oglesbee & Lord, 2010, JEPM Oglesbee & Lord, 2010, JEPM, GI motility and cecal function are closely linked — any disruption of normal GI transit can alter cecotrope production and composition. Persistently abnormal cecotropes (too liquid, too dry, or too voluminous) combined with other signs of GI disease warrant full veterinary evaluation.
Husbandry Adjustments
For diet-related excess cecotropes: dramatically increase the proportion of grass hay (Timothy, orchard grass, meadow hay) to 80–85% of the total diet, reduce or eliminate pellets, and eliminate treats, fruits, and vegetables until the problem resolves. Pellets should be offered at 1 tablespoon per 2 lbs of body weight per day at most. Hay provides the fiber needed to normalize cecal fermentation and cecotrope composition.
For obesity: weight reduction through caloric restriction (hay-only diet for several weeks to months) is necessary. A target body condition is a rabbit where you can feel the ribs but not see them prominently. Weighing monthly during the weight loss process is helpful.
When to See a Vet
Call your vet today if:
- Cecotrope accumulation is new and occurred suddenly in a previously healthy rabbit
- You notice the rabbit is reluctant to eat, lethargic, or not producing normal hard droppings
- The rabbit appears to be in pain when sitting or moving
- Skin irritation, urine scald, or fly strike risk from accumulated cecotropes
Go to the ER immediately if:
- Absence of all fecal output (both hard pellets and cecotropes) for more than 6–8 hours (GI stasis emergency)
- The rabbit is hunched, grinding teeth, or showing signs of severe abdominal pain
- Liquid, watery diarrhea (distinct from cecotrope accumulation — this is a true emergency)
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Frequently Asked Questions
Are cecotropes the same as diarrhea in rabbits? No — cecotropes are a normal, intentional product of rabbit digestion and are meant to be eaten. They are soft, grape-clustered, shiny, and strong-smelling. True diarrhea in rabbits is liquid, profuse, and odorless — and is a veterinary emergency. Soft cecotropes on the fur mean the rabbit isn't eating them, not that it has diarrhea.
How do I clean cecotropes off my rabbit's fur? Gently remove dried cecotropes with warm water on a washcloth or unscented wipes (never submerge a rabbit in water). Trim matted fur carefully to prevent skin irritation. Address the underlying cause to prevent recurrence — ongoing cecotrope accumulation causes urine scald and significant discomfort.
How much does treating cecotrope accumulation cost? If the cause is dietary (obesity, excessive pellets), the fix is free — replace pellets with unlimited hay. A vet exam to rule out dental disease or musculoskeletal pain costs $80–200. Dental work (molar floating) adds $300–800 under anesthesia. X-rays for spondylosis or arthritis add $150–350. Total workup typically costs $200–600.
What if my rabbit's cecotropes are always too liquid or too dry? Cecotropes that are consistently too liquid (mushy, coating the fur easily) suggest excessive simple carbohydrate fermentation — reduce or eliminate pellets and increase hay. Cecotropes that are too dry and hard may indicate dehydration or insufficient fiber fermentation. Persistent abnormality warrants a vet evaluation to rule out GI disease.
Can cecotrope accumulation cause infection? Yes — accumulated cecotropes trap moisture, encourage bacterial overgrowth on the skin, and create a warm, moist environment that attracts flies (flystrike risk in outdoor or warm-weather rabbits). Prompt daily hygiene and treatment of the underlying cause are important to prevent skin infection (moist dermatitis) and potentially life-threatening flystrike.
Still Not Sure if Your Rabbit Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of the cecotropes, your rabbit's rear end, or any skin changes, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.