Salsa — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Onion, garlic and chilli together. All three cause problems.
The full verdict, portion guidance and serving notes are collected on the Salsa food facts page.
Short answer
Yes, even a small taste of salsa is very likely to upset a sensitive cat's stomach. Salsa combines onion, garlic, and chilli, all of which are gastrointestinal irritants for cats, not just toxins. The spices and acidity can quickly lead to vomiting, diarrhea, or abdominal discomfort. If your cat has a known sensitive stomach, it's best to avoid salsa entirely. If she already licked some, offer plain water and monitor her closely; call your vet if digestive upset develops.