Rabbit GI Stasis: The Silent Killer

Gastrointestinal stasis is not a single disease but a final common pathway: gut motility slows or stops, gas and impacted ingesta accumulate, and a rabbit that was eating normally yesterday may be anorexic and hunched today. Because rabbits are obligate hindgut fermenters with a constant need for fibre throughput, even a 12-24 hour interruption in eating can cascade into a genuine emergency.

Why Rabbit Guts Cannot Simply Pause

Rabbits rely on caecal fermentation to break down cellulose, and this process depends on continuous forward movement of ingesta driven by peristalsis and the rabbit's near-constant grazing behaviour. When anything interrupts intake, whether dental pain, stress, dehydration or an underlying illness, gut transit slows, water is reabsorbed from the caecal contents, and the resulting mass becomes drier and harder to move.

As motility falls further, gas-producing bacteria proliferate in the stagnant caecum, distending the gut wall and causing pain, which itself further inhibits motility. This self-reinforcing cycle can progress within a day to endotoxaemia, hepatic lipidosis from negative energy balance, and in severe cases gut wall compromise, making early intervention within hours rather than days genuinely life-saving.

Common Triggers, From Pain to Poor Diet

• Reduced or absent faecal pellets for more than 12 hours
• Hunched posture with reluctance to move or stretch out
• Grinding teeth (bruxism) indicating visceral pain
• Bloated, tympanic abdomen that feels tight on gentle palpation
• Complete refusal of pellets, hay and favourite treats

A rabbit that skips a single meal but still passes some pellets is different from one that has stopped eating and defecating entirely; the latter pattern, especially combined with bruxism and a distended abdomen, should be treated as an emergency rather than monitored overnight.

Reading the Early Warning Signs

Veterinary assessment starts with abdominal palpation to distinguish a gas-filled, painful caecum from a firm, non-tender stomach full of impacted material, since the two require different urgency. Auscultation for reduced or absent gut sounds helps confirm hypomotility, while a temperature check screens for the hypothermia seen in advanced, toxic cases.

Lateral abdominal radiographs are the key diagnostic tool, distinguishing functional stasis (gas pattern throughout with a soft stomach) from a true obstruction (a discrete, rounded foreign mass or severely distended, gas-trapped loop), because obstructions need surgery while stasis is managed medically. Blood glucose and PCV/total protein give a rough gauge of severity and dehydration.

Confirming Stasis and Ruling Out Obstruction

Once obstruction is excluded, treatment focuses on rehydrating the gut contents, restoring motility, controlling pain, and getting calories into the rabbit, usually started the same day as diagnosis.

• Subcutaneous or intravenous fluids to rehydrate impacted caecal contents
• Prokinetic drugs such as metoclopramide or cisapride to restore motility
• Multimodal analgesia, commonly meloxicam plus an opioid for painful cases
• Syringe-fed critical care formula and fresh hay offered continuously

Getting the Gut Moving Again

Rabbits that recover from a stasis episode need diet review, since low-fibre pellet-heavy diets are a recurring risk factor; unlimited grass hay should form at least 80 percent of intake, with pellets limited to a measured daily portion. Any underlying dental disease, arthritis or chronic pain that discouraged eating must also be addressed, as pain is one of the commonest silent drivers of repeat episodes.

Owners of rabbits with a stasis history are usually advised to keep simethicone and a prokinetic on hand under veterinary guidance, weigh the rabbit weekly, and monitor faecal output daily, since catching a second episode within hours rather than a day markedly improves the outcome.

When to seek help urgently

• No faecal pellets passed for over 12 hours
• Abdomen feels tight, swollen or painful to touch
• Rabbit is lethargic, cold to touch or collapsed
• Straining without producing pellets, suggesting possible obstruction

This overview is general in nature and cannot substitute for a hands-on assessment of your own rabbit; if stasis is suspected, contact your vet immediately rather than waiting to see if appetite returns.