Arugula — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Safe in small amounts as a green treat.
The full verdict, portion guidance and serving notes are collected on the Arugula food facts page.
Short answer
No, arugula is not harmful for cats even when fed regularly. It is a safe leafy green that can be offered as a small, occasional treat. However, daily feeding over weeks can lead to minor digestive upset like soft stools in some cats, as their systems aren't designed for large amounts of plant matter. To be safe, keep the portions very small—just a leaf or two a few times a week—and monitor your cat's litter box habits. If you notice any changes in appetite or digestion, simply stop the arugula and consult your regular vet.