A rabbit that has stopped eating typically needs 8 to 12 mL of prepared Critical Care per kilogram of body weight, given four times a day. So a 2 kg (roughly 4.4 lb) rabbit would get about 16 to 24 mL per feeding session, four times daily. Getting the amount right matters because too little won’t keep the gut moving, and too much in one sitting can cause dangerous bloating.
Calculating the Right Amount
The standard target is 8 to 12 mL per kilogram of body weight per feeding session, with four to five sessions spread throughout the day. Here’s what that looks like for common rabbit sizes:
- 1.5 kg rabbit (about 3.3 lb): 12 to 18 mL per session
- 2 kg rabbit (about 4.4 lb): 16 to 24 mL per session
- 3 kg rabbit (about 6.6 lb): 24 to 36 mL per session
- 4 kg rabbit (about 8.8 lb): 32 to 48 mL per session
If you don’t know your rabbit’s exact weight, a kitchen scale works well. Place a box or container on the scale, zero it out, then set your rabbit inside. Knowing the weight precisely makes a real difference here since even a half-kilogram error changes the feeding volume meaningfully.
Some veterinary guidelines suggest rabbits can comfortably take 10 to 15 mL per kilogram in a single feeding, so the 8 to 12 mL range keeps you safely within what the stomach can handle. If your rabbit seems uncomfortable, stops swallowing, or starts pushing the syringe away, stop the session even if you haven’t reached the target volume. You can offer the remainder 30 to 60 minutes later.
How to Mix Critical Care
Mix the powder with lukewarm water at a 1:1 or 1:2 ratio (powder to water). A 1:1 ratio creates a thicker paste, while 1:2 gives you a thinner, smoothie-like consistency that flows more easily through a syringe. Most rabbits tolerate the thinner mix better, especially when you’re using a smaller syringe.
Water that’s too hot can burn your rabbit’s mouth and destroy some of the nutrients. Water that’s too cold makes the mixture unappealing. Aim for body temperature, roughly the warmth you’d want for a baby’s bottle. Stir thoroughly until no dry clumps remain. If the mixture is too thick to draw into your syringe, add a small splash more water.
Prepared Critical Care should be used within a few hours at room temperature. If you mix a larger batch, refrigerate the unused portion and warm individual servings before feeding. Discard any refrigerated mixture after 24 hours and mix a fresh batch.
Feeding Schedule and Frequency
Four to five feeding sessions per day is the standard recommendation for a rabbit recovering from gut stasis or any condition that’s caused them to stop eating. Space the sessions roughly evenly across your waking hours. For four feedings, that might look like 7 a.m., 12 p.m., 5 p.m., and 10 p.m.
Consistency matters more than hitting exact times. A rabbit’s digestive system is designed to process food almost continuously, so long gaps between feedings work against recovery. If your rabbit starts nibbling hay or greens on its own between sessions, that’s a great sign, but keep up the syringe feeding schedule until your rabbit is eating a normal volume of hay independently.
Syringe Feeding Technique
Use a 1 mL syringe for small or very reluctant rabbits and a 3 to 5 mL syringe for rabbits that are accepting food more readily. Larger syringes can deliver too much too fast, increasing the risk of food going into the airway instead of the stomach.
Keep your rabbit in a natural upright position, either sitting on a towel on your lap or on a flat surface. Never tilt a rabbit onto its back to feed it. That position makes it far easier for food to enter the lungs, which can cause aspiration pneumonia.
Slide the tip of the syringe gently into the side of the mouth, behind the front teeth. Dispense a small amount (about 0.5 to 1 mL at a time) and wait for your rabbit to chew and swallow before giving more. Rushing the process increases mess, stress, and aspiration risk. Wipe any food that collects around the chin or dewlap after each session, since dried Critical Care can irritate the skin and mat the fur.
Signs You Need to Adjust
If your rabbit’s droppings are still very small, misshapen, or absent after 24 hours of syringe feeding, the volume or frequency may need to increase. On the other hand, a bloated or hard belly after feeding suggests you’re giving too much per session. In that case, reduce the per-session volume and add an extra feeding to compensate.
Watch for food bubbling from the nose during feeding. This is a sign that food entered the nasal passage or airway, and you should stop the session immediately. It usually means you’re dispensing too quickly or too much at once. Let your rabbit recover fully before trying again with smaller, slower amounts.
As your rabbit begins eating hay on its own, you can gradually reduce the number of syringe feeding sessions. Most rabbits recovering from a short bout of gut stasis return to independent eating within two to four days. If your rabbit still refuses all food after 48 hours of syringe feeding, the underlying cause likely needs further veterinary attention.