Rabbit Bloat (Gastric Dilation in Rabbits) – Emergency Guide

“My rabbit is not eating.”
“My rabbit has a stomachache.”

🚨 Food refusal in rabbits is ALWAYS an emergency. It can become fatal within hours. Do not wait.

Withdrawn or apathetic behavior is often a sign of a life-threatening condition.

Food refusal and digestive disorders in rabbits are extremely serious and frequently lead to death. Every rabbit owner must understand the risks and know how to act immediately

Important: In most cases, rabbits do not have a primary digestive issue.
Instead, another illness causes food refusal, which then leads to gastric dilation (rabbit bloat).

First Aid for Rabbit Bloat

Emergency medication can be given immediately:

• Simethicone (e.g. Sab Simplex): 0.5–1 ml/kg, 3–6× daily
• Alternatives: Simethicone or Dimethicone products
• Colosan / RodiCare akut: 7–10 drops, 3× daily

Additional measures:

• Gently massage the abdomen
• Check ear temperature
• Measure body temperature

If no improvement within a short time → go to a rabbit-savvy vet immediately
Waiting up to 1 hour maximum may be acceptable depending on condition.

Immediate vet visit required if:

• Dehydration (skin fold test delayed)
• Hypothermia (< 38.5°C / 101.3°F)

During transport:

• Keep the rabbit warm
• Use blanket + warm water bottle (not hot!) or Snuggle Safe

Symptoms of Gastric Dilation in Rabbits

Typical signs of rabbit bloat / gastric dilation:

• Not eating (even favorite food refused)
• Lethargy / withdrawal
• Reduced activity
• No feces (often unnoticed in groups)
• Enlarged, bloated abdomen
• Pain when touched

Advanced stage:

• Shock
• Hypothermia
• Dehydration

Diagnosis is only possible via X-ray at a veterinarian

Causes of Rabbit Bloat (Gastric Dilation)

Rabbit bloat is usually secondary, not primary.

Common causes:

• Pain (dental disease, organ disease, ear infections) leads to dehydration of the intestinal contents. Due to weak muscle movement, the contents are not transported properly, meaning fermentation issues occur, and a dry, sticky food mixture forms (sometimes with small hairballs that were already present).
• Dehydration of intestinal contents
• Poor gut motility → fermentation → gas formation
• Hairballs (bezoars): Pure hairballs are rarer than commonly assumed! Especially during molting, the ingestion of a lot of fur (from grooming their own coat, grooming other rabbits during molting, or from compulsively pulling out their own fur) can form a solid mass in the intestines, leading to blockages (bezoar, hairballs). However, hairballs typically only cause problems if the rabbit is not fed a purely fresh food diet, but is instead given some type of dry food, oats, etc., or if fresh greens are not available 24 hours a day.
• Dry or inappropriate diet
• Lack of fresh greens
• Constipation is strongly encouraged or even triggered when the rabbit is fed very dry, energy-dense, or protein-rich food. The dry food mass cannot be moistened and does not move through the digestive system. Natural food consists of 70-80% moisture (fresh food), which is why a rabbit’s digestion is designed for a very moist food transport.
• Many rabbits occasionally stop eating because they feel nauseous. This is often due to stomach disorders, particularly in rabbits with chronic illnesses, stressed animals, or those receiving repeated pain medication. A migrating hairball or intestinal inflammations can also be the cause. Such animals may need to be given acid blockers (like Omeprazole) or stomach protectants (like Sucralfate, Ranitidine) on a long-term basis.

Additional risk factors:

• Parasites (coccidia, worms, yeast). Submit a poop sample from three days to rule out parasites.
• Intestinal inflammation (enteritis)
• Chronic illness / stress
• Tumors (rare)
• Foreign bodies (plastic, carpet fibers, litter, etc.)
• Lack of water
• Heat
• Infectious diseases
• Obesity / lack of movement. Obesity can also push on the intestines, making constipation more likely.
• Sudden dietary changes
• Hypothyroidism can also trigger constipation.
• Tissue adhesions after female neutering (rare).
• Mold in the food or living area.
• Space-occupying diseases of the uterus or other organs
• Long periods without eating or rapid eating (gulping) can often lead to bloating. Offer your rabbits plenty of fresh greens multiple times a day so they can eat at their own pace and consume food consistently throughout the day and night.
• Strangulated hernias or prolapsed intestines that block the digestive system.
• Abdominal abscesses.
• Swallowed currant seeds, pellets, dried fruit/vegetables, or unsoaked flaxseeds can swell in the intestines (rare).
• Eating clumping materials (e.g., cat litter, straw pellets, bedding, cardboard, fabrics) or other foreign objects that expand in the gut can cause issues.
• Low-fiber, dry, or poorly digestible diets worsen constipation in rabbits.
• Sudden large amounts of dry food or treats often lead to constipation.

Important myth:
Cabbage does NOT cause bloat in healthy rabbits.
Problems occur due to bad diet (pellets, dry food).

How Gastric Dilation Develops

When rabbits stop eating:

• Food is no longer transported
• Contents dry out
• Fermentation begins
• Gas builds up

The stomach fills with gas + liquid → bloat

In obese rabbits:

• Stomach cannot expand properly
• Pressure on heart and lungs → circulatory failure and death

⚠️ Dysbiosis (disruption of the gut flora) occurs very quickly, leading to difficulty breathing and circulatory collapse, which can result in death!

Diagnosis – How to Identify Gastric Dilation (Rabbit Bloat)

If you suspect gastric dilation (rabbit bloat), it is critical to consult a veterinarian who is experienced with rabbits and other exotic pets. A standard small animal vet (dogs and cats) is often not sufficient, as rabbits require specialized knowledge and training.

Body Temperature – A Key Indicator

A rabbit’s normal body temperature should not fall below 38.5°C (101.3°F).

• Low temperature (hypothermia) → indicates a critical condition affecting circulation, heart function, and stomach activity
• High temperature (fever) → may indicate infection or inflammation

Important: Stress can raise temperature and should not be mistaken for fever.

Both hypothermia and fever can lead to food refusal, which can ultimately result in gastric dilation in rabbits.

Possible Complications

In advanced cases, serious complications may develop:

• Paralytic ileus (intestinal paralysis) → food no longer moves
• Neurological symptoms:
  • Incoordination
  • Movement disorders
  • Altered consciousness
  • Coma

As the condition progresses, it can lead to:

• Liver failure
• Kidney failure
• Breathing difficulties

Life-saving measures must be started immediately in cases of hypothermia—before full diagnostics are performed.

X-rays – Essential for Diagnosis

A veterinarian will:

• Palpate the rabbit
• Measure body temperature
• Perform X-rays (always required)

X-rays should be taken from two views, with the lateral view being most important.

Typical findings:

• Enlarged stomach
• Fluid and gas accumulation

A centrally or laterally positioned gas bubble (“mirror image”) indicates a worse prognosis.

Detecting Blockages (Ileus)

The location of a blockage can be identified by:

• Gas accumulation patterns
• Contrast X-rays (in selected cases only)

Findings:

• Section before the blockage → overfilled
• Section after the blockage → gas-filled

Contrast studies:

• Only iodine-based contrast agents (never barium sulfate)
• Can help visualize hairballs or foreign material

Risks of contrast media:

• Overloads digestion
• Can damage intestinal walls (risk of rupture)
• Disrupts gut bacteria

❗ Do NOT use in dehydrated rabbits.

Important: Insist on X-rays at your veterinarian! This is the only way to reliably diagnose gas buildup and locate blockages—palpation alone is not sufficient!

Blood Tests – Prognosis and Risk Assessment

Blood tests provide important information about severity and prognosis.

• Around 70% of rabbits with intestinal obstruction show high blood glucose
• Average: 24.7 mmol/L
• Above 20 mmol/L (360 mg/dL) → poorer prognosis

Additional findings:

• Elevated liver values → possible liver lobe torsion
• Signs of inflammation
• Kidney damage

Blood tests help assess complications and guide treatment decisions.

Urine Analysis

Urine test strips can help evaluate metabolic status.

• Acidic urine pH → indicates catabolic state
• Associated with a worse prognosis

Ultrasound – Additional Diagnostics

Ultrasound is useful for:

• Detecting liver lobe torsion (even if blood values are normal)
• Evaluating digestive organs
• Investigating underlying causes

Appendicitis (Often Overlooked in Rabbits)

Appendicitis (inflammation of the cecal appendix) is a rabbit-specific condition and often missed.

Symptoms:

• Fever
• Pain on palpation
• Tubular structure in abdomen

Findings:

• Often low glucose levels
• Possible low calcium
• Regenerative anemia

If suspected → perform ultrasound of the cecum

Fecal Testing

In cases of:

• High environmental temperatures
• Multiple rabbits affected
• Digestive disturbances

Perform a bacterial stool test to rule out intestinal infections

Gastric dilation before and after 2 hours of treatment.

Key Takeaway

Rabbit bloat (gastric dilation) cannot be diagnosed reliably without imaging.
X-rays are essential to detect gas buildup and intestinal blockage.
Early and accurate diagnosis significantly improves survival chances.

Understanding Rabbit Digestive Disorders (Rabbit Bloat, Ileus & More)

Rabbits can suffer from several serious digestive conditions that are often confused with each other. Understanding the differences between gastric dilation (rabbit bloat), ileus, and other gastrointestinal disorders is essential for early recognition and proper treatment.

Gastric Dilation (Rabbit Bloat)

Gastric dilation refers to an enlarged stomach filled with gas, liquid, and food slurry, which can be clearly identified on X-rays.

It is most commonly caused by:

• Ileus (intestinal blockage or slowdown)
• Food refusal due to pain or illness
• Poor diet (too dry, low-fiber, or poorly structured food)

This condition is life-threatening and requires immediate veterinary attention.

leus (Intestinal Blockage or Paralysis)

Ileus is a disruption of normal food movement through the digestive tract, either due to a physical blockage or intestinal paralysis.

Common causes include:

• Hairballs (bezoars)
• Foreign objects (plastic, carpet fibers, etc.)
• Poorly chewed food (often due to dental disease)
• Intestinal paralysis

Ileus is one of the most common underlying causes of rabbit bloat (gastric dilation).

Tympany (Bloating in Rabbits)

Tympany describes gas accumulation in the digestive tract, often due to:

• Blockages
• Reduced gut motility
• Food refusal

While often used interchangeably with “rabbit bloat”, tympany specifically refers to gas buildup, not necessarily an enlarged stomach.

Gastric Overload

Gastric overload occurs when the stomach becomes overfilled with food slurry, usually due to:

• Rapid eating (e.g., strict feeding schedules)
• Sudden dietary changes
• Consumption of swelling foods:
  • Pellets
  • Chopped hay
  • Flour-based products

Although rare, it can contribute to digestive emergencies similar to gastric dilation.

Constipation in Rabbits

Constipation is a partial blockage of the digestive tract, where food movement is slowed but not completely stopped.

Common causes:

• Ingested bedding or foreign material
• Improper diet (too dry, low moisture)

Unlike ileus, some passage is still possible, but the condition can worsen quickly.

Stasis (Gut Stasis in Rabbits)

Stasis refers to a slowdown or complete (stagnation) of intestinal movement.

It is often an early stage of more severe conditions like ileus or gastric dilation.

Coprostasis

Coprostasis is the accumulation of feces in the colon, typically caused by:

• Poor diet
• Lack of movement
• Dehydration

This condition is often linked to chronic digestive problems in rabbits.

Key Takeaway

• Many of these conditions are closely related and can quickly progress into gastric dilation (rabbit bloat).
  

• Early recognition and immediate action are critical for survival.

Treatment of Gastric Dilation in Rabbits (Rabbit Bloat Treatment)

Treatment of gastric dilation (rabbit bloat) always begins with stabilizing the rabbit. This is a life-threatening emergency and must be handled by a rabbit-experienced veterinarian.

Emergency Stabilization

The first priority is to stabilize the rabbit’s condition:

• Warmed intravenous fluids (IV infusions) depending on circulatory status
• Heat support
• Oxygen therapy if needed
• Pain management:
  • Buprenorphine
  • Novalgin (10–20 mg/kg, 2–3× daily, can be combined)

⚠️ Do NOT use Meloxicam (Metacam) in these cases.

In cases of gastric overload, oral medication is often ineffective because it does not reach the small intestine in time.
Therefore, medication should be administered intravenously whenever possible.

Anti-Nausea Treatment

Nausea is a major factor in rabbits that stop eating.

• Metoclopramide (MCP / Emeprid):
  • Initial dose: 5 mg/kg (injection preferred)
  • Follow-up: 0.2–1 mg/kg, 1–3× daily
  • Max duration: 3 days, then taper

⚠️ Do NOT use in cases of constipation.

• Maropitant:
  • Often very effective against nausea

Improving Gastrointestinal Motility

Restoring gut movement is critical in rabbit bloat:

• Metoclopramide:
  • Effect not fully proven, but often effective in higher doses
• Cisapride:
  • Effectiveness unclear
• Lidocaine infusion:
  • 100 μg/kg/min IV over 2 days
  • Proven effects:
    • Pain relief
    • Anti-inflammatory
    • Anti-endotoxic
    • Prokinetic (stimulates gut movement)
• Mirtazapine (3 mg/kg once daily):
  • Can stimulate appetite
  • Requires hospitalization and monitoring

Stomach Protection and Acid Control

To protect the stomach and prevent complications:

• Omeprazole → reduces stomach acid
• Sucralfate / Ranitidine → protect stomach lining

Helps prevent acidosis and further irritation

Metabolic Support

• Butafosfan + Cyanocobalamin (Vitamin B12, e.g. Catosal)
  Supports metabolism and recovery

Reducing Gas (Core Treatment for Rabbit Bloat)

• Simethicone / Dimethicone
  Breaks down gas bubbles → easier elimination

Relieving Constipation

• Lactulose (e.g. Albrecht)
  Draws water into intestines → softens stool

Herbal Support (Phytotherapy)

Products such as:

• Colosan
• RodiCare akut

Effects:

• Improve blood flow in intestinal mucosa
• Antispasmodic
• Reduce gas formation
• Antimicrobial properties

Use of Oils – Benefits and Risks

• Plant oils:
  • Can have a laxative effect
  • Stimulate gut movement (motilin)
  • BUT: ~80% absorbed → may not reach target area
• Paraffin oil:
  • Not absorbed
  • May affect gut flora (not proven)

Never use paraffin oil with dry cecal contents

Spasmolytic drugs (e.g., Buscopan) should never be used for digestive disorders in rabbits!

Supportive Measures at Home / Vet-Guided

• Gentle abdominal massage:
  • Helps move intestinal contents
  • Should be guided by X-ray finding
• Encourage movement:
  • Light activity stimulates digestion
  • Balance with rest

Antibiotics (Only If Necessary)

If bacterial overgrowth is suspected (e.g. pseudoleft shift in blood test):

• Enrofloxacin
• Metronidazole

Only use rabbit-safe antibiotics.

• Dangerous antibiotics:
  • Penicillin
  • Ampicillin
  • Amoxicillin
  • Clindamycin
  • Cephalosporins
  • Erythromycin

Hypoglycemia (Rare but Critical)

• Requires immediate glucose administration

However: Only occurs in about 1.7% of cases (Harcourt-Brown, 2012)

Key Takeaway

Rabbit bloat treatment requires rapid stabilization, correct medication, and experienced veterinary care.
Wrong treatment (e.g. incorrect drugs or force feeding) can be fatal.

Warning: Do NOT Force Feed in Suspected Rabbit Bloat

In cases of intestinal blockage (ileus) or severe gastric dilation (rabbit bloat), forced feeding or large amounts of medication (e.g. Lactulose) can be fatal.

• The stomach wall is very thin → risk of gastric rupture
• Overfilling increases pressure on the diaphragm → breathing problems
• Can lead to circulatory collapse and death

Only feed if a blockage has been ruled out by a vet and the stomach is not overloaded.
In that case, use small amounts of thin liquids only.

Advanced Treatment & Surgery (Rabbit Bloat / Ileus)

In acute cases, stomach contents may be carefully drained via a tube to stabilize circulation.
However, this procedure carries risks, as the tube can cause a tear in the stomach wall.

Surgery – When Is It Necessary?

If medical treatment fails, surgery may be required.

Conservative (non-surgical) treatment is preferred, as:

• Surgery carries significant risks
• Prognosis is often good with early, intensive care

What Happens During Surgery

If the blockage is located further back in the intestines:

• The mass (food, hair, feces) can often be gently massaged forward
• In many cases, hairballs can be:
  • Pushed into the large intestine
  • Or moved back into the stomach and broken down
• Gas may sometimes be released using a syringe

Prognosis

• If the stomach or intestines must be surgically opened, prognosis worsens
• Still necessary as a last resort

A firmly lodged foreign body can quickly cause intestinal tissue death, making fast intervention critical.

Key Takeaway

Surgery is a last option, but sometimes lifesaving.
Early treatment significantly improves survival chances.

Diet & Care for Sick Rabbits

During illness, it is best to offer the rabbit a variety of fresh aromatic and wild herbs, as well as alfalfa, clover, cabbage, and meadow herbs. However, the main priority is that the rabbit eats; what it eats is secondary.

Causes of Rabbit Bloat – Why Rabbits Stop Eating

Food refusal in rabbits always has an underlying cause and must be taken seriously. Identifying the cause is essential, as it helps prevent gastric dilation (rabbit bloat) and allows proper treatment of potentially painful conditions.

In many cases, rabbits stop eating due to pain or illness, not because of a primary digestive problem.

Common Causes of Food Refusal in Rabbits

Pain-related conditions:

• Uterine diseases
• Ear infections
• Diaphragmatic hernias

Nausea-related causes:

• Kidney failure
• Kidney stones
• Gastritis

Diet – A Major Risk Factor

Incorrect feeding is one of the most common causes of digestive problems in rabbits.

Risk factors include:

• Too many carbohydrates (fruit, seeds, tuber vegetables, dry food)
• Energy-dense, low-fiber foods (pellets, commercial dry food)
• Poorly structured diet
• Dental disease (often caused by improper feeding)

These factors can disrupt digestion and lead to rabbit bloat (gastric dilation).

Stress as a Trigger

Stress can also cause rabbits to stop eating.

It activates the sympathetic nervous system, which slows down or stops stomach and intestinal activity.

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Key Takeaway

Food refusal in rabbits is never random.
There is always an underlying cause—and ignoring it can quickly lead to a life-threatening emergency like rabbit bloat.

Nutrition for Prevention – How to Prevent Rabbit Bloat

Rabbits with a history of digestive problems are especially prone to gastric dilation (rabbit bloat). The most important prevention is a consistent, species-appropriate diet that keeps the digestive system constantly active and well hydrated.

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The Right Diet Makes the Difference

The best diet for rabbits is based on unlimited fresh greens, ideally wild plants. This ensures a steady digestive flow and prevents constipation.

Avoid and gradually eliminate:

• Pellets and commercial dry food
• Mixed feed
• Grains and excessive seeds

If digestion stabilizes:

• Small amounts of seeds are possible
• Max. 1 teaspoon per rabbit per day
• Always soak seeds (e.g. flaxseed, chia) before feeding

❗ Commercial feeds are not recommended due to poor ingredients and negative effects on digestion.

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Diet After Illness

After recovery, focus on a green-rich diet:

• Unlimited meadow herbs and leafy greens
• Fresh vegetables
• Hay as a supplement

Fresh food is essential, as dry diets almost always lead to recurring constipation and digestive issues.

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Increase Fluid Intake

Proper hydration is key for digestion:

• Diluted plant juices (e.g. carrot juice, no added sugar)
• Unsweetened herbal teas

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Support Digestion & Prevent Constipation

These can help stabilize digestion:

• Soaked flaxseeds or psyllium husks
  • 1 tsp (5g) in 100 ml water overnight
  • Feed 1–3 tsp per rabbit
  • Can be frozen in portions
• Lactulose (e.g. Albrecht)
  • Draws water into the intestines → softens stool
• RodiCare Hairball
  • Proven effective in practice

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Key Takeaway

A fresh, green-based diet is the most effective prevention against rabbit bloat.
Dry food and low-moisture diets are the main cause of recurring digestive problems.

These types of feed are specifically effective against bloating and help regulate digestion.

• Aromatic Herbs: Dill, peppermint, lemon balm, basil, parsley, thyme, oregano, sage, chives, wormwood, lovage, lavender, nettle

• Forest and Meadow Herbs: Bear’s foot, dandelion, oak bark and leaves, wild garlic, true chamomile, pussy willow and branches, yarrow, chicory

• Seeds: Dill seeds, fennel seeds, caraway, aniseed

• Vegetables: Fennel, ginger

Diet During Shedding – Preventing Hairballs in Rabbits

During shedding, rabbits ingest more fur, which can lead to hairballs (bezoars) and even rabbit bloat. Prevention is essential.

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Remove Loose Fur (Carefully)

• Gently remove loose fur (hands, brush, damp gloves)
• Use plucking brushes if needed
• Place brushes in tunnels for self-grooming

Avoid excessive brushing → may increase fur ingestion

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Diet Is Key

• Unlimited fresh greens (meadow plants, herbs, leafy vegetables)
• Available day and night

❗ Avoid:

• Dry food
• Dried herbs
• Too much hay without fresh food

Fresh food helps move ingested fur through digestion.

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Support Digestion

• RodiCare Hairball
• Lactulose
• Soaked psyllium husks (mixed with vegetables)

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Environment & Movement

• Ensure plenty of space and movement
• Vacuum more during shedding (especially indoors)

In extreme cases: light fur trimming can help

Important

Poop chains are normal – they show fur is being excreted

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Key Takeaway

Hairballs are mainly prevented by:

• Fresh, green-rich diet
• Controlled grooming
• Movement and clean environment

Common Mistakes That Cause Hairballs in Rabbits

The following dietary and housing mistakes increase the risk of life-threatening hairballs:

• Hay as the main diet with only small amounts of fresh food
• Hay combined with dry food and fresh food
  → dry food absorbs moisture and worsens digestion
• Hay-based or dry food-based diets with low moisture intake
• Too much concentrated food (seeds, grains, etc.)
• Commercial dry food (pellets, mixes)

Dry food is especially problematic because:

• It absorbs water in the digestive tract
• Contains very little moisture
• Often provides insufficient fiber

Diets low in moisture and high in dry or concentrated foods are a major cause of hairballs in rabbits.

Malt Paste for Rabbits – Not Recommended

Malt pastes (e.g. Bezo-Pet) are often used for hairballs, but they are not suitable for rabbits.

Why They Don’t Work

• Designed for cats, not rabbits
• “High fiber” for cats = too low for rabbits
• Rabbits already get more fiber from normal food

Main ingredients:

• Malt (often poorly digestible wheat)
• Plant oils (absorbed too early → little effect)
• Additives (often unnecessary or harmful)

These pastes do not effectively help with hairballs.

Malt paste is unnecessary and can be harmful.
Proper diet is far more effective for preventing hairballs.

Before-and-after photos

Yuki with stomach pain

Elli with hairballs
Elli had a large clump of hair, and possibly some textiles (carpet, etc.), in her stomach. Unfortunately, it couldn’t be resolved with medication. Therefore, surgery was recommended: Through an abdominal incision, her stomach was opened and emptied. It took nearly two weeks before she was eating on her own again. To feed her, I had to put her in a pillowcase (a tip from the vet), as it was impossible to reach her mouth otherwise (she had her jaw tightly clenched). But all the sleepless nights were worth it! She’s doing great now.

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