Overview
Rabbits, guinea pigs, chinchillas, and similar small herbivores cannot vomit. Once a toxin enters their GI tract, it must pass through, and many also trigger dangerous gut stasis on top of direct poisoning. A narrow and cautious menu of greens is far safer than experimenting with "healthy" human foods.
Foods to Strictly Avoid
Iceberg Lettuce — contains lactucarium and so much water that it causes diarrhea, dehydration, and gut imbalance; unlike romaine or red leaf, it offers almost no nutrition.
Rhubarb Leaves (Rheum rhabarbarum) — oxalic acid crystals cause kidney damage and death; the stalks are also best avoided for rabbits.
Avocado (Persea americana) — persin causes cardiac and respiratory failure in small mammals.
Onion, Garlic, Chive, Leek — allicin compounds cause hemolytic anemia and immunosuppression.
Raw Beans & Dried Legumes — lectins and phytohaemagglutinin cause severe GI distress.
Apple Seeds, Cherry Pits, Peach Pits — cyanogenic glycosides release hydrogen cyanide during digestion. The flesh is fine; the seeds and pits are not.
Chocolate & Caffeine — theobromine and methylxanthines are cardiotoxic.
Processed Sugars & Starches — bread, cereal, crackers, and yogurt drops disrupt cecal fermentation and cause fatal enterotoxemia.
Sugar Snap Peas in Excess — occasional small amounts are fine, but the high sugar content unbalances the hindgut when offered daily.
Toxic Ornamental Plants
Foxglove (Digitalis purpurea) — cardiac glycosides; rapidly fatal.
Carnation (Dianthus) — mild to moderate GI toxicity and dermatitis.
Lily of the Valley, Oleander, Yew, Rhododendron — all cardiotoxic; avoid in any bouquet that shares air or floor with free-range pets.
Tomato & Potato Greens (Solanum) — solanine causes neurologic and GI signs; fruit flesh is fine, leaves and stems are not.
Tulip, Daffodil, Hyacinth, Iris Bulbs — cause severe vomiting, drooling, and cardiac effects.
Clinical Signs of Poisoning or GI Stasis
Reduced or absent droppings, loss of appetite, hunched posture, tooth grinding, lethargy, drooling, diarrhea, and seizures are all emergency signs. Because rabbits decline rapidly once they stop eating, any suspected exposure warrants same-day veterinary care.
Emergency Response
Contact an exotics-experienced veterinarian and the ASPCA Animal Poison Control Center at (888) 426-4435 or Pet Poison Helpline at (855) 764-7661. Bring the suspected food or plant sample. Do not attempt to induce vomiting — it is not possible in these species. Keep the animal warm, quiet, and hydrated with syringe water or electrolytes only if directed by the veterinarian.
The safest rabbit diet is unlimited grass hay, filtered water, a measured pellet portion, and a small daily salad of known-safe greens such as romaine, cilantro, parsley, basil, and dandelion leaf from unsprayed sources.