# Blood in Ferret Pee or Poop: Causes and When to Rush In Blood in a ferret's pee or poop is never normal, and it always deserves a veterinary phone call at minimum. Fresh red streaks usually point to bleeding low in the gut or urinary tract, while dark tarry stool means digested blood from higher up. Because ferrets hide illness until they are very sick, bloody droppings in any ferret mean you should seek veterinary care right away [1]. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Bright red blood on the stool surface or in urine usually means bleeding near the exit point, such as the colon, rectum, bladder, or urethra. - Black, tarry, sticky stool (melena) means blood has been digested, which points to bleeding in the stomach or upper small intestine [2]. - Bloody urine, straining to urinate, or any bleeding from the urinary or genital area needs same-day veterinary care [1]. - Bloody, foul-smelling, or uncontrollable diarrhea is listed as an emergency sign in ferrets [1]. - Do not wait to see if it clears up on its own. Ferrets can go from "a little off" to critically ill fast [1]. ## What Blood in Ferret Pee or Poop Actually Looks Like Owners often are not sure what they are seeing. Ferret stool is normally brown, tubular, and fairly well formed. Urine is normally yellow to amber, and ferrets may produce a lot of it. Here is how to sort out what you found. ### Fresh red blood (hematochezia) This looks like bright red streaks, drops, or coating on the outside of the stool. It can also appear as red-tinged mucus or fresh drips in the litter box. Fresh red blood means the bleeding is happening somewhere blood does not spend much time being digested, usually the lower intestinal tract. ### Dark tarry stool (melena) Melena is black, sticky, and looks like tar or coffee grounds. It has a strong, foul odor. This is digested blood from the stomach or upper small intestine [2]. Melena is easy to miss on dark litter, so check the stool itself, not just the box. ### Blood in urine (hematuria) Bloody urine can look pink, red, or like diluted blood. You may also see blood spotting around the vulva or prepuce, or on the fur of the belly and hind legs. Straining to urinate, crying out, or frequent small trips to the litter box are common alongside it [1]. ### What is normal An occasional soft or irregular stool is not usually a problem [1]. A one-time soft poop in an otherwise bright, eating, playful ferret is rarely an emergency. Blood is different. Blood is the line where you call your vet. ## Why Is My Ferret Pooping Blood? The Main Causes Blood in stool or urine has a short list of common causes in ferrets. The table below gives the typical clues for each one. | Cause | Typical clues | How urgent | |---|---|---| | Urinary stones (uroliths) | Straining to pee or poop, bloody stool or urine, rectal prolapse, often young ferrets | Emergency. One reported case involved a 10-month-old ferret with large bladder and ureter stones, anemia, and rectal prolapse [3] | | Cystine uroliths | Bloody urine, straining, recurrent stones, often middle-aged to older ferrets | Urgent. Cystine stones have become the most common type submitted from ferrets, and surgery is currently the only definitive treatment [4] | | Urethral obstruction | Cannot pee at all, painful belly, lethargy, collapse | Emergency. In one review, about 41% of ferrets with urethral obstruction were euthanized at presentation [5] | | GI ulcers | Dark tarry stool, vomiting, not eating, weight loss, often older ferrets | Urgent to emergency [1] | | ECE (epizootic catarrhal enteritis) | Green, mucoid, foul diarrhea that may contain blood, often after contact with another ferret | Urgent. Bloody, foul-smelling diarrhea is an emergency sign [1] | | Foreign body blockage | Stopped eating and pooping, vomiting, may cough or choke, blood possible | Emergency. Blocked ferrets stop eating and defecating and can decline fast [1] | | Bacterial gut infection | Diarrhea with blood, weight loss, possible kidney involvement | Urgent. In a ferret model, Shiga toxin-producing E. coli caused bloody urine and kidney damage in some infected animals [6] | | Adrenal disease with prostate involvement | Straining to urinate, blood in urine, hair loss, thin skin | Urgent. Adrenal disease-associated prostate problems caused about 19% of urethral obstructions in one review [5] | ### Urinary stones and blockages Stones are one of the top reasons a ferret bleeds from the urinary or lower digestive tract. Struvite stones were historically the most common type in ferrets, and mixed stones containing struvite and calcium oxalate also occur [7]. More recent lab data show a shift toward cystine stones as the most common type submitted [4]. Stones can sit in the bladder, ureters, or urethra. When they scrape or block the tract, you see blood and straining. A 10-month-old ferret with stones in both ureters and the bladder was brought in for straining to urinate and defecate, bloody stool, and a rectal prolapse [3]. That case shows how stones can cause signs that look like a gut problem. ### GI ulcers and dark tarry stool Melena in a ferret often means an ulcer is bleeding in the stomach or upper intestine [2]. Ulcers can be linked to stress, other illness, or medication use. A ferret with an ulcer may also vomit, refuse food, grind its teeth, or lose weight. ### ECE and other gut infections ECE is a common viral gut infection in ferrets. It causes green, slimy, foul-smelling diarrhea, and blood can appear. Bloody, foul-smelling, or uncontrollable diarrhea is on the emergency list for ferrets [1]. Bacterial infections can also cause bloody stool, and some gut infections in ferrets have been linked to kidney damage and bloody urine [6]. ### Foreign body blockage Ferrets swallow foam, rubber, hair ties, and small toys. A blockage causes vomiting, no appetite, and no stool. With advanced disease, a ferret may cough, choke, or vomit [1]. Blood can show up if the gut lining is damaged. Any vomiting or diarrhea lasting more than 24 hours needs a vet visit because ferrets dehydrate and weaken quickly [1]. ### Other causes to know - Insulinomas cause low blood sugar, weakness, hind leg dragging, and sometimes seizures. These need immediate veterinary attention [1]. - Adrenal disease can cause prostate enlargement in males, leading to urinary blockage and blood [5]. - Rectal prolapse often goes with straining from stones or gut disease [3]. If your cat or dog has similar signs, the same logic applies: blood in urine or stool means a vet visit. You can read more about it in these articles on [cat blood in urine](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-blood-in-urine-causes-when-to-rush), [dog blood in urine](/knowledge/veterinary-medicine/digestive-and-urinary-care/dog-blood-in-urine-causes-emergency-steps), and [blood in dog stool](/knowledge/veterinary-medicine/emergency-care/blood-in-dog-stool). ## Red Flags That Make It an Emergency Go to an emergency clinic now, or call ahead while you drive, if your ferret has any of these: - Bloody urine, pain while urinating, or bleeding from the urinary or genital area [1] - Bloody, foul-smelling, or uncontrollable diarrhea [1] - Dark, tarry droppings [1] - Straining to urinate with little or no urine coming out - Vomiting or diarrhea lasting more than 24 hours [1] - Lethargy or a sudden behavior change [1] - Not eating, not pooping, coughing, choking, or vomiting (possible blockage) [1] - Weakness, wobbling, hind leg dragging, or seizures (possible insulinoma) [1] Ferrets hide illness until it is advanced, so a sick ferret can become critically ill quickly [1]. When in doubt, treat it as an emergency. ## Safe Things You Can Do at Home While You Wait You cannot treat this at home, but you can gather information that helps your vet. - Take photos of the stool and urine. Include something for scale, like a coin. - Save a fresh stool sample in a clean plastic bag if you can get one. - Note the color, texture, and smell of what you saw. - Write down when the signs started and whether they are getting worse. - Track eating, drinking, peeing, and pooping for the last 24 hours. - Keep your ferret warm, quiet, and confined to a small carrier or cage. - Offer water, but do not force food or fluids by mouth. - Do not give any human or leftover pet medication. Doses for ferrets must be calculated by a veterinarian based on your ferret's weight and health. - Call the clinic before you arrive so they can prepare. Do not wait for a routine appointment if you see any red flag sign. Call now. ## What Your Veterinarian Will Check and Test Your vet will start with a full history and physical exam. They will feel your ferret's belly, check the bladder, look at the gums, and check hydration. Common tests include: - Blood work to check red blood cells, white blood cells, kidney values, and blood sugar. Anemia and high creatinine were found in a ferret with urinary stones [3]. - Urinalysis to look for blood, crystals, and infection. - X-rays to look for stones and blockages. Plain radiographs found large bladder and ureter stones in one ferret [3]. - Ultrasound to check the kidneys, bladder, and prostate. Serial ultrasounds tracked kidney swelling from ureter stones in one case [3]. - Fecal testing to look for infection and parasites. - Contrast studies or endoscopy if a gut problem is suspected [2]. Treatment depends on the cause. Stones often need surgery. Cystine stones currently have no proven dietary dissolution plan in ferrets, so surgery is the definitive treatment, with diet and urinary changes used afterward [4]. Ulcers are treated with acid-reducing medication and gut protectants. Infections are treated with antibiotics chosen by your vet. Blockages need surgery. ## Prevention and Monitoring You cannot prevent every cause, but you can lower risk and catch problems early. - Feed a ferret-appropriate diet. Ask your vet about diet changes that may help with certain stone types after treatment [4]. - Ferret-proof your home. Remove foam, rubber, hair ties, and small swallowable objects. - Supervise playtime outside the cage. - Keep up with wellness exams. Your vet can catch early kidney, heart, and blood sugar problems. - Watch the litter box. Know what normal stool and urine look like for your ferret so you notice changes fast. - Quarantine new ferrets and wash your hands. ECE spreads easily between ferrets. - Track weight monthly. Weight loss is an early clue for several ferret diseases [1]. - If your ferret has had stones, follow up as directed. Recurrence is possible. ## Limitations and When to Contact a Veterinarian This article cannot tell you what is wrong with your specific ferret. Only a veterinarian who examines your ferret can do that. Call your veterinarian the same day if you see: - A small amount of fresh red blood on one stool, with a bright, eating, active ferret - One episode of soft stool with a red streak - Any change in urination habits, even without visible blood Go to an emergency clinic now if you see: - Bloody urine or bleeding from the urinary or genital area [1] - Bloody, foul-smelling, or uncontrollable diarrhea [1] - Dark, tarry stool [1] - Straining to urinate with no urine produced - Vomiting or diarrhea for more than 24 hours [1] - Lethargy, weakness, hind leg dragging, or seizures [1] - Not eating, not pooping, coughing, choking, or vomiting [1] Schedule a routine visit for monitoring if your ferret has a known stone history, adrenal disease, or a prior GI problem, even when it seems fine. ## Frequently Asked Questions ### Can blood in ferret poop go away on its own? Sometimes a single small streak clears, but you should not assume it will. Bloody or dark tarry droppings mean you should seek veterinary care right away [1]. Waiting risks missing a stone, ulcer, or blockage that gets worse fast. ### How do I tell if the blood is from the poop or the pee? Look at where the blood sits. Blood coating or streaking a formed stool is from the gut. Blood mixed into urine, or spotting on the fur around the genitals, is from the urinary tract. If you cannot tell, take photos of both and let your vet sort it out. ### Is blood in ferret urine always a urinary tract infection? No. Stones, bladder inflammation, prostate disease from adrenal disease, and other problems cause bloody urine too. In one review, stones caused about 57% of urethral obstructions and adrenal-related prostate disease caused about 19% [5]. Your vet needs tests to find the cause. ### My ferret is pooping blood but acting normal. Should I still call? Yes. Ferrets hide illness until it is advanced, so a ferret that looks fine can still be very sick [1]. Call your vet and describe what you saw. They will tell you whether to come in now or watch closely. ### What does black tarry poop mean in a ferret? Black tarry stool means digested blood from the upper gut, often from an ulcer [2]. It is a serious sign and needs veterinary care right away [1]. Do not wait for it to change color on its own. ## Related Articles - [Why Is My Ferret Drooling? Causes and When to Worry](/knowledge/veterinary-medicine/small-mammal-care/ferret-drooling-causes) - [Why Is My Ferret Walking in Circles? Causes to Check](/knowledge/veterinary-medicine/small-mammal-care/ferret-walking-in-circles) - [Helicobacter pylori Infection in Cats and Ferrets: Gastric Ulcer Pathogenesis, Diagnosis, and Treatment](/knowledge/bacteria/pet-bacteria/helicobacter-pylori-cats-ferrets-gastric-ulcer-diagnosis-treatment) - [Ferret Coronavirus](/knowledge/viruses/pet-viruses/ferret-coronavirus) ## References 1. [Emergencies of Ferrets - All Other Pets](https://www.merckvetmanual.com/all-other-pets/ferrets/emergencies-of-ferrets). Merck Veterinary Manual. 2. [Ferret Gastroenterology](https://pubmed.ncbi.nlm.nih.gov/39721814/). The veterinary clinics of North America. Exotic animal practice, 2025. 3. [Ureteroneocystostomy for treatment of struvite urolithiasis in a ferret](https://pubmed.ncbi.nlm.nih.gov/37217174/). Journal of the American Veterinary Medical Association, 2023. 4. [Cystine Urolithiasis in Ferrets](https://pubmed.ncbi.nlm.nih.gov/32327038/). The veterinary clinics of North America. Exotic animal practice, 2020. 5. [Retrospective analysis of 68 domestic ferrets with urethral obstruction shows high rate of euthanasia at presentation despite good survival to discharge](https://pubmed.ncbi.nlm.nih.gov/42674007/). Journal of the American Veterinary Medical Association, 2026. 6. [Ferrets as a model system for renal disease secondary to intestinal infection with Escherichia coli O157:H7 and other Shiga toxin-producing E. coli](https://pubmed.ncbi.nlm.nih.gov/11865409/). The Journal of infectious diseases, 2002. 7. [Mixed urolith (struvite and calcium oxalate) in a ferret (Mustela putorius furo)](https://pubmed.ncbi.nlm.nih.gov/18776112/). Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc, 2008. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Ferrets](https://www.merckvetmanual.com/all-other-pets/ferrets)