Lettuce is non-toxic to cats and very low in calories, but it is mostly water and offers little nutrition. A small piece is harmless, and large amounts can cause loose stool.
Chop into small, plain pieces rather than large leaves, and skip any dressing, oil, or seasoning.
Both are non-toxic. Romaine has somewhat more nutrients than iceberg, but neither is necessary for a cat, and large amounts can cause loose stool.
Many cats simply enjoy the texture of fresh leaves. If the chewing is frequent, is followed by vomiting, or comes with weight loss or other changes, mention it to your veterinarian.
No. Dressings often contain salt, oil, onion, or garlic. Offer plain, unseasoned leaves only.
General public resources referenced while researching this tool's topic.
General educational guidance based on the references above, not veterinary advice. See our editorial policy for how we choose sources.
This tool is intended for educational purposes only and should not be used as a substitute for emergency veterinary advice, diagnosis, or treatment.
If your pet may have consumed toxic foods, chocolate, medications, chemicals, or other dangerous substances, seek immediate help from a licensed veterinarian or emergency animal service in your area. Do not delay professional care based on calculator or search results alone.
Pet poison hotlines (24/7, US and Canada):
ASPCA Animal Poison Control Center: (888) 426-4435
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Pet Poison Helpline: (855) 764-7661
Pet Poison Helpline states its service covers the U.S., Canada and the Caribbean. The ASPCA line is also used by Canadian pet owners. A consultation fee may apply to both. In Canada, your nearest 24-hour emergency vet clinic is the best first call; elsewhere, use local emergency veterinary directories.
How we calculate results: This tool uses commonly referenced veterinary toxicity thresholds and food safety guidelines. Actual toxicity can vary based on your pet's size, health status, and exact substance consumed. These results are estimates only and do not replace a veterinary assessment.