How dressing concentrates the anchovy risk
Caesar dressing blends anchovy paste with oil and acids, creating a delivery system that coats your cat's mouth thoroughly. Unlike whole fish where they might reject bones or skin, the emulsified form means maximum sodium absorption. The typical lemon juice or vinegar base also irritates feline digestive tracts, compounding the salt's effects.
Estimate the "substantial lick" by the dressing's cling—if it left visible gaps on the plate, your cat likely ingested emulsified anchovy equivalent to 1/4 teaspoon or more. At this concentration, even cats who normally tolerate people food may react strongly. The raw egg in traditional recipes adds salmonella risk too.
Garlic's hidden presence in dressings
Many commercial Caesar dressings use garlic powder as a stabilizer, which is more dangerous to cats than fresh garlic. The drying process concentrates allicin, the toxic compound, and the dressing's oil helps it absorb faster. Even "garlic-free" labels sometimes list it as "natural flavoring," so assume it's present unless you made the dressing yourself.
Watch for garlic-specific signs like pale gums or rapid breathing alongside salt symptoms—these often appear 6-12 hours later as the compounds metabolize. The combination with anchovies creates overlapping timelines that can confuse monitoring efforts unless you're watching for both.
Why texture matters with dressing ingestion
The creamy thickness of Caesar dressing means it adheres to the esophagus and stomach lining, prolonging contact time compared to watery liquids. This gives salt and garlic compounds more opportunity to absorb while potentially delaying vomiting that might otherwise purge the toxins. The fat content may also trigger pancreatitis in some cats.
Check your cat's front paws and chest fur for dressing residue—their grooming will spread the exposure. Use a damp cloth to wipe away any visible dressing, paying special attention to paw pads where they might continue licking it off. The less they can re-ingest during grooming, the better.
When salad accompaniments multiply the danger
If the plate held croutons or grated cheese, your cat may have ingested onion or garlic powders from those as well. Restaurant salads often contain hidden seasonings beyond the obvious dressing—even the lettuce might have been washed in solutions containing garlic oil. These cumulative exposures stack risks for small bodies.
Note whether the dressing was creamy or vinaigrette-style—the latter's higher acidity increases stomach irritation. If parmesan flakes were present, their lactose content could cause additional digestive upset. Document every component you remember being on that plate, not just the dressing itself.
The full verdict, portion guidance and serving notes are collected on the Anchovy food facts page.