Experienced and professional animal trainer provide their insights in answering this question :
A. I am deeply sorry for your loss. Rabbits can, unfortunately, die as a result of having diarrhoea. This is because severe dehydration is sometimes a result since the necessary fluids are not able to be absorbed from the gut.Bacterial enteritis develops very rapidly and treatment often comes too late.

How to Identify Common Pet Problems ?

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Enterotoxemia causes rapidly developing, severe diarrhea, primarily in rabbits 4 to 8 weeks old. It occasionally affects adults and adolescent rabbits. Signs include lack of energy, rough coat, staining around the hind end, and death within 48 hours.
Infectious Causes of Sudden Death in Rabbits

The domestic rabbit, also known as the European rabbit (Oryctolagus cuniculus), are prone to a multitude of infections that may cause them to die suddenly. Pathogens that may cause mortality in rabbits include those which are bacterial, viral, and protozoan.

If your rabbit is having soft, liquid, bloody, or foul smelling feces, and not producing any of the normal, solid round feces, this is urgent, and should be evaluated by a veterinarian immediately.
Diarrhea is a sign of gastrointestinal problems and can have multiple causes including incorrect diet (too high in carbohydrates, too low in fiber, or rapid diet changes), bacterial, viral, or parasitic infections, consumption of inappropriate oral drugs (such as certain antibiotics), toxin ingestion, or secondary to …
Signs and symptoms of worms in rabbits

Baby rabbits are often more severely affected than adults and signs can include lethargy, substantial weight loss and diarrhoea.

Calicivirus and myxomatosis in rabbits are two serious infectious diseases. They are most common during the warmer months of the year (spring until autumn). Calicivirus and myxomatosis in rabbits cause death and are spread by insects such as flies, mosquitoes and midges.
Stress can actually kill rabbits

The most common ways that stress affects your rabbit is by lowering his body temperature (hypothermia) or by causing him to become dehydrated, which can cause a drop in blood pressure. Stress can also lead to heart failure and respiratory problems.

Poisoned rabbits often become lethargic and weak, and may lose their appetite. Some develop obvious abdominal pain and breathing difficulties. Rabbits with these signs may die, even with treatment. Find more information on poisoning in rabbits.
Signs: unformed feces varying in consistency from `cowpat` to mucoid to liquid. True diarrhea occurs when no hard fecal pellets are produced. Large volumes of soft or liquid feces are passed with little or no voluntary control.
Effects of stress on rabbits

This process can take some time. In fact, it can take as long as seven days after a stress event for diarrhea to become obvious, thus making it difficult to link the disease back to its cause.

Diarrhea in rabbits can be very smelly. And it also should not be happening. If you notice your rabbit has mushy or runny poop, this is a sign that your rabbit has a serious health problem.
November 1, 2020. Gastrointestinal (GI) stasis is a potentially dangerous condition in rabbits, where muscular contractions of the stomach and intestines are reduced and normal bacteria in the digestive tract become out of balance.
One of the most common diseases in rabbits is coccidiosis. Coccidiosis is an infection caused by parasites (coccidia) in the intestines. Contamination is possible through eating grass and hay in the rabbit pen that harbours the eggs (oocysts) of these parasites.
Increase in stickiness of feces. Coat in poor condition. Lack of appetite. Diarrhea and enteritis around the time of weaning.
This may be normal behavior. Sick or injured rabbits may be identified by abnormal behaviors such as lying on their sides for extended periods of time, head tilting, falling over, or inability to run in a straight line.
How do I save a wild bunny from dying? Contact the proper authorities immediately. Moving an injured or sick bunny can do more damage than good. Watch over the bunny until help arrives, and if you must move him, do so gently and with care.
The most commonly used rabbit poison of this type in the Bay of Plenty is Pindone, though a CSL is not required to purchase or use Pindone in a baitstation, a CSL is required if using bait-mats or hand broadcasting pindone onto the ground. These poisons are fast acting and will kill rabbits after a single dose.
What are some common diseases of pet rabbits? Common conditions of pet rabbits include upper respiratory tract infections (snuffles), internal and external parasites, dental disease, gastrointestinal (GI) stasis, uterine problems (infections or cancer), and pododermatitis (foot sores or sore hocks).
It is important that you understand all the requirements for caring for a rabbit before you buy one. Rabbits generally live for 5 to 8 years depending on their environment and breed, but they can live for as long as 12 years. If you decide to purchase a rabbit, make sure you are prepared to care for them that long.
Floppy Rabbit Syndrome (FRS) is considered an acute neurological condition characterised by a sudden inability to hop around. The muscles of the legs and sometimes the neck are flaccid. FRS remains a poorly understood diagnosis in rabbits, with research ongoing in an attempt to identify an inciting cause.
You may worry that your rabbit will be lonely. If you spend a lot of time with your rabbit, they will undoubtedly miss you when you`re away, the same way you miss them. The two of you have developed a bond and friendship that your pet rabbit also understands.
Signs: diarrhea, depression, fever, abortion, death. Diagnosis: bacteriology.
Limp, floppy or cold – If your rabbit sits hunched in a corner and feels funny when you pick him or her up, you have a very, very sick animal. This weak, floppy condition, often accompanied by cold ears, indicates severe dehydration, shock or sepsis.
Symptoms of GI stasis include very small (or no) fecal pellets, sometimes clinging to the bunny`s bottom. In some cases, very small fecal pellets will be encased in clear or yellowish mucus. This potentially serious problem (enteritis, an inflammation of the intestinal lining) should be treated as an emergency.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Wants to go out very frequently. Has fecal matter attached to anus but won’t let me remove it. She won’t sleep and wants to stay on my lap.
ANSWER : A. So I’m hearing a couple of problems going on. Frequent defecation with diarrhea (I’m assuming, since there’s fecal matter attached and the anus, and typically it only “sticks” when it’s soft) and lethargy/clinginess. Pretty general signs, however let’s focus on the diarrhea and assume it’s a GI thing. You didn’t tell me whether this is a cat or dog but I’ll assume dog since you said she goes outside to defecate.

Diarrhea may or may not be a sign of a serious disease. I don’t get especially concerned with one or two episodes in an animal who seems to feel completely normally otherwise, but what you’re describing sounds concerning. Your dog is restless, can’t get comfortable, and is somewhat needy – all of those indicate discomfort to me.

Without knowing how old your dog is it’s pretty difficult to get specific about causes, but I’ll mention some possibilities. Certainly parasites, including giardia, can cause diarrhea, as well as bacterial or viral infections in the gut. Indiscriminate eating, which dogs are master of, can cause diarrhea. Food allergies or sensitivities as well as inflammatory bowel disease are on the list. More serious causes include liver, kidney, or pancreatic disease, as well as intestinal cancers.

I’m hoping this has only been going on for a little while. You can try feeding a bland/high-fiber diet of boiled white meat chicken and white rice (25% chicken and 75% rice) in small (1/4 to 1/2 cup) amounts frequently (every two hours). If the diarrhea doesn’t resolve in 12 hours see a veterinarian. If she’s vomiting or won’t eat at all, see a vet sooner.

Read Full Q/A … : Leerburg

Q. Nursing dog pups 13 days old has sudden onset of diarrhea and vomiting what can I do
ANSWER : A. You can try with holding food for 12 hours. Offer unflavored Pedialyte if she’ll drink. If she doesn’t vomit or have diarrhea for those 12 hours you can then offer small amounts of a bland diet such as boiled white meat chicken (25%) and boiled white rice (75%) without flavoring or fat added. Offer about 1/4 cup every 2 hours. If she continues to do well and has an appetite do this for 12 hours, then transition back to a normal diet slowly. If she continues to have vomiting or diarrhea I think it’s important that you seek veterinary care, since continual loss of fluid through vomiting and diarrhea while nursing is very dangerous to any dog, but especially to a very small dog like a chihuahua.

Q. What can a human get from a rabbit? What illness can a human get from a domesticated rabbit?
ANSWER : A. Actual diseases passed from rabbit to human is rare. the most common issues are allergies to rabbits and infection from a bite or scratch.
Wild rabbits may pass on salmonella but this is rare and even rarer in domestic rabbits. The only other thing is mites. some rabbits suffer from cheyletiella which can be transmitted to humans.

Q. My dog has suffered from diarrhea with vomit and bloody stools for about 3 months. Vet has given Metronidazole, but hasn’t been effective
ANSWER : A. Several things can cause a dog’s diarrhea, and chronic diarrhea can sometimes be hard to treat. However the most common causes of chronic diarrhea can be from food allergies to certain ingredients in the diet as well as a disruption in the gut bacteria. Metronidazole helps with chronic diarrhea in some cases if there is an underlying bacterial condition. Checking your dog’s food for common allergens such as wheat, corn or soy products may alert you to a problem as these can cause a lot of digestive issues in some dogs. Some dogs may also be allergic to more common protein types such as beef, lamb or even chicken, so finding a food with an alternate protein source can also help. Natural remedies to help clear up diarrhea can also include adding plain yogurt to meals to seed the gut with healthy bacteria, or adding pureed pumpkin to provide a fiber boost to firm up stools. However, if these things don’t help with the diarrhea, additional testing and treatment with your vet is best.

Read Full Q/A … : Causes of Blood in Dog Stool

Q. My puppy has deherria what can I do?
ANSWER : A. You can with hold food for 12 hours, then start by feeding a bland diet, like boiled white meat chicken and boiled white rice mixed 25%/75%. Feed small (1/4 cup) frequent (every 2 hours) amounts for 12 hours, then if no more diarrhea transition back slowly to his normal diet. If the diarrhea continues, or if he’s vomiting or not eating or lethargic, seek veterinary care to determine the cause of the diarrhea and get appropriate treatment.

Q. We have 2 cats and got 2 rabbits yesterday. 1 rabbit died with probably E.Cuniculi. How at risk are our cats? What can we do?
ANSWER : A. This parasite is dangerous only for rabbits. Your cats are safe but the other rabbit can get the parasite. Disease is spreaded by urine and hay or litter contaminated with urine. Keep the rabbit in separate new cage with new litter. If you will notice any sign of infestation ( opthalmological or neurological) see a vet as soon as possible

Q. Can you give a 14 week old puppy who ia 16lbs neometh kp by the ounce for diarrhea?
ANSWER : A. Puppies often get diarrhea as they are licking and trying all sorts of things. If the pup is otherwise well and it has only had diarrhea a few times in 24 hours it is best not to give anything as it can go the other way and cause constipation. If the diarrhea continues for 48 hours or pup is unwell then you need to see a vet as it may have an infection or virus which would require proper veterinary treatment.

Q. My rabbit gas diarea and the room where it lives is stinking bad,How can I cure my rabbit?
ANSWER : A. As long as the rabbit is otherwise bright, happy a d eating then it could just be due to an imbalance in gut flora. You can try Fibreplex paste (a pro biotic paste for rabbits). If there are any other symptoms such as lethargy, off food then you need to see your vet straight away as rabbits can go downhill very quickly in the matter of hours and it can be hard to bring them back when they get very poorly.