Sometimes — with care
Dark leafy lettuces (romaine, lamb’s lettuce, red leaf) are great for rabbits. Iceberg lettuce is the trap: watery, nutrition-free and capable of causing diarrhoea.
Romaine and other dark lettuces provide fibre, water and vitamins, and can be part of the daily greens rotation every rabbit needs. Iceberg is the exception for two reasons: it’s nutritionally empty (96% water) so it displaces better food, and its high water and lactucarium content can cause diarrhoea in rabbits — a genuinely dangerous condition for them, since rabbit digestion depends on stable gut flora. Always introduce any new green gradually over a week.
A generous handful of dark leafy lettuce daily is fine as part of a mixed greens plate (about 1 packed cup of greens per kg of rabbit per day). Iceberg: none. Wash everything — pesticide residues hit a 2 kg body hard.
Rotate romaine with coriander, basil, dill, mint and parsley for a varied greens plate.
This article is general information, not veterinary advice. If your pet has eaten something potentially harmful or shows symptoms, contact your vet or an emergency clinic immediately. Full disclaimer.