Suspect poisoning? US: ASPCA Poison Control (888) 426-4435 · UK: 01202 509 000 · Severe symptoms → nearest emergency vet now.

Is a slice of deli meat more dangerous for my 12-year-old senior cat than a spoonful of canned tuna in water?

Cats · Food safety

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Yes, deli meat is riskier for a senior cat. While both are high in sodium, deli meat often contains garlic and preservatives, which canned tuna in water does not. For an older cat, even a small slice could upset their stomach or stress their kidneys. Offer only a tiny piece as a rare treat, and watch for vomiting or lethargy, then call your vet if you see those signs.

Deli meat — Food safety facts

Feed with care · Cats · full breakdown on the linked food page

Salt and preservatives, and some are seasoned with garlic. A small piece as a treat.

Dogs and cats carry the same rating (Feed with care), so the notes below hold for either pet.

Deli meat is not poisonous to cats, but it is easy to over-feed. Rich fat, salt or seasoning can bring on vomiting or diarrhoea within a day, and repeated large portions are a recognised trigger for pancreatitis.

If it ate some before you noticed, watch for vomiting, diarrhoea, loss of appetite, unusual tiredness or a painful, swollen abdomen over the next 24 hours. A one-off small amount in a healthy adult usually passes with water and rest; repeated exposure, a puppy or kitten, a senior, or a pet with an ongoing illness is a reason to call your vet the same day.

Why these cautions matter

Garlic and onion damage a pet's red blood cells and can bring on anaemia. Signs are often delayed for several days, so looking fine straight afterwards does not rule it out.

A heavy salt load drives up thirst and urination, and in the worst cases leads to sodium ion poisoning, which is a genuine emergency.

The full verdict, portion guidance and serving notes are collected on the Deli meat food facts page.

Open the full food page: Deli meat food facts →