Oxbow Critical Care is a specially formulated recovery food that has become an essential tool in rabbit medicine. Designed to be mixed with water and syringe-fed to sick, post-surgical, or anorexic rabbits, Critical Care provides the high-fiber, nutrient-dense nutrition that rabbits need to maintain gut motility and prevent life-threatening complications. Because rabbits can develop hepatic lipidosis (fatty liver) within 24 to 48 hours of not eating, and because GI stasis worsens rapidly without continued food intake, syringe feeding is often a critical intervention during recovery from any illness or procedure. Critical Care is available over the counter at many veterinary clinics and pet stores, but it should be used under the guidance of a rabbit-savvy veterinarian.
What Is Critical Care Used For?
- GI stasis: maintaining nutritional intake while gut motility is being restored
- Anorexia from any cause: illness, stress, pain, or recovery from anesthesia
- Post-surgical recovery: supporting rabbits following dental procedures, spay/neuter, or other surgery
- Dental disease: rabbits with painful dental problems may need syringe feeding while their teeth are being treated
- Debilitated rabbits: elderly, arthritic, or chronically ill rabbits who cannot eat enough on their own
- Hepatic lipidosis prevention: maintaining caloric intake to prevent fatty liver disease
- Neonatal/orphan support: weanling rabbits who need supplemental nutrition
Why Syringe Feeding Is Critical for Rabbits
Rabbits have unique nutritional and physiological needs that make continuous eating essential:
- Continuous gut motility: rabbits need constant fiber intake to keep their complex GI tract moving
- Hepatic lipidosis risk: when rabbits stop eating, they rapidly mobilize body fat to the liver, overwhelming the liver’s processing capacity and causing potentially fatal fatty liver disease within 24 to 48 hours
- Cecal fermentation: the rabbit cecum depends on a steady supply of fiber to feed the beneficial bacteria that produce essential nutrients
- No vomiting reflex: rabbits cannot vomit, meaning syringe feeding carries less aspiration risk than in species that can vomit
- Behavioral reinforcement: eating triggers normal digestive activity and helps break the stasis cycle
A rabbit that is not eating is a medical emergency. Syringe feeding with Critical Care provides both nutrition and gut contents to keep the digestive system functioning while the underlying condition is addressed.
Product Composition
Critical Care is formulated specifically for herbivores with high fiber requirements:
- High-fiber content: approximately 25% crude fiber, providing the indigestible fiber essential for rabbit gut motility
- Appropriate protein levels: around 16% protein, suitable for rabbit nutritional needs
- Timothy hay-based: most formulations use timothy hay as the primary ingredient, appropriate for adult rabbits
- Prebiotics: support healthy gut flora
- Vitamins and minerals: balanced for rabbit nutritional requirements
- Digestible when hydrated: mixes with water to form a slurry that can be drawn into a syringe
Several formulations are available:
- Critical Care (original): standard formulation
- Critical Care Fine Grind: smaller particle size, useful for feeding through smaller syringes or for rabbits with dental issues
- Critical Care for Carnivores: not for rabbits; formulated for carnivorous animals
- Critical Care Herbivore with Apple and Banana: flavored variant
Preparation and Dosage
Always follow your veterinarian’s specific feeding instructions.
Standard preparation:
- Measure 1 part Critical Care powder
- Add 1.5 to 2 parts warm water
- Mix thoroughly to form a smooth slurry (consistency of thick pudding or yogurt)
- Allow to sit for 1 to 2 minutes to fully hydrate
- Adjust consistency by adding more water or powder as needed for the syringe being used
Feeding amount:
| Rabbit Size | Daily Amount | Frequency |
|---|---|---|
| Small (1 to 2 kg) | 30 to 60 mL of prepared slurry | Divided into 3 to 6 feedings |
| Medium (2 to 4 kg) | 60 to 120 mL of prepared slurry | Divided into 3 to 6 feedings |
| Large (4 to 6 kg) | 120 to 180 mL of prepared slurry | Divided into 3 to 6 feedings |
A general rule is approximately 50 to 80 mL of prepared Critical Care per kg of rabbit per day, divided into multiple feedings. Your veterinarian will provide specific instructions based on your rabbit’s condition, size, and ability to eat voluntarily.
Syringe selection: Use a curved-tip or standard oral dosing syringe, typically 5 to 10 mL. Larger syringes (35 to 60 mL) can be used for larger volumes but may be harder to control. The Fine Grind formulation works better with smaller syringes.
Feeding Technique
Proper technique is essential to avoid aspiration and ensure successful feeding:
- Approach from the side: never force the rabbit’s head back; this can cause aspiration
- Wrap if needed: some rabbits tolerate being gently wrapped in a towel (“bunny burrito”)
- Insert the syringe tip: at the side of the mouth, behind the incisors, aimed toward the back of the mouth
- Deliver slowly: small amounts at a time, allowing the rabbit to chew and swallow
- Let the rabbit set the pace: never force large volumes; allow swallowing between deliveries
- Stop if the rabbit struggles excessively: forced feeding when the rabbit is fighting increases aspiration risk
- Take breaks: feeding sessions may take 15 to 30 minutes
- Keep the rabbit clean: wipe the face after each feeding to prevent food accumulation in fur
Signs of Recovery
Indications that your rabbit is improving and may need less syringe feeding:
- Eating hay or greens on their own
- Producing normal fecal pellets
- Resuming cecotrophy (eating cecotropes, the soft, nutrient-rich droppings)
- Increased activity and engagement with environment
- Maintaining body weight
- Drinking water normally
Do not stop syringe feeding abruptly. As the rabbit begins eating on its own, gradually reduce the volume and frequency of syringe feeding, allowing them to transition back to voluntary intake. Always consult your veterinarian about when to taper syringe feeding.
Cautions and Considerations
- Never syringe feed a rabbit with a suspected GI obstruction: radiographs should rule out mechanical obstruction before initiating syringe feeding in a severely ill rabbit
- Watch for aspiration signs: coughing, gagging, nasal discharge, or labored breathing after feeding require immediate veterinary attention
- Fresh preparation: mix fresh Critical Care for each feeding; do not store prepared slurry for more than a few hours (refrigerated)
- Temperature: prepare with warm (not hot) water; room-temperature slurry is most palatable
- Do not rely on Critical Care alone for long-term nutrition: it is designed as a short-term recovery food; rabbits should return to a normal diet of hay, greens, and limited pellets as soon as possible
- Address the underlying cause: syringe feeding supports the rabbit while the underlying problem is diagnosed and treated; it is not a standalone solution
Alternatives and Adjuncts
- EmerAid Herbivore: another commercial recovery food, often used in veterinary hospitals for intensive care
- Homemade alternatives: in a pinch, soaked rabbit pellets (without added ingredients) blended with water can be used, though commercial recovery foods are preferred for balanced nutrition
- Fresh greens and hay: always offer these to the rabbit; some rabbits will eat soft foods (cilantro, parsley, leafy greens) even when refusing hay
When to Seek Veterinary Care
Seek immediate veterinary attention if your rabbit:
- Has not eaten voluntarily for more than 12 hours
- Has not produced fecal pellets for more than 12 hours
- Shows signs of pain (teeth grinding, hunched posture, reluctance to move)
- Has abdominal distension
- Is lethargic or weak
- Has labored breathing
- Vomits or regurgitates during syringe feeding (this is not normal in rabbits and indicates a serious problem)
Storage
Store unopened Critical Care in a cool, dry place. Once opened, reseal the bag tightly or transfer to an airtight container. Check the expiration date. Discard any prepared slurry that has been sitting for more than a few hours.
Always consult your rabbit-savvy veterinarian when your rabbit stops eating. Syringe feeding is supportive care and should be combined with diagnosis and treatment of the underlying condition. This information is for educational purposes and does not replace professional veterinary advice.