Not recommended — cats and pizza
Not safe. Pizza combines multiple cat hazards in one dish: garlic in almost every tomato base sauce, onion in most topping combinations, high-sodium processed cheese, and fatty processed meat toppings. A cat that eats pizza has been exposed to allium compounds, sodium, and fat in a single meal. No version of a commercial or takeaway pizza is appropriate for cats.
🏆 Pet Care Community Safety Score™ — Pizza for Cats
"The pizza base sauce is the most consistent concern. Every commercial pizza — takeaway, frozen, or homemade from a jar — uses a tomato base that almost universally contains garlic. In high-garlic pizza variants (garlic prawn pizza, garlic bread pizza, anything from a wood-fired pizza restaurant that advertises its garlic bread) the garlic content is significant enough to cause real concern even from one slice. Add the cheese (high sodium, high fat, lactose), the cured meat toppings (processed meats, more sodium and nitrates), and you have assembled all the worst ingredients for a cat in one round dish."
The straight answer
Pizza is not safe for cats. Not a slice, not a bite of the crust, not "just the topping." The individual components of a pizza — tomato sauce base, mozzarella, processed toppings, dough — combine multiple hazards that are each problematic for cats independently. The garlic in the base sauce is the most clinically significant concern; the sodium from cheese and cured meat toppings compounds it.
Why each part of a pizza is a problem
The base sauce
Every commercial pizza tomato sauce — from Domino's to a frozen supermarket pizza to a jar of pizza sauce — contains garlic as a core flavour ingredient. Some recipes include onion as well. The garlic content in a standard pizza base is not trace-level: a homemade pizza sauce recipe uses 2–4 cloves of garlic per tin of tomatoes; a commercial jar uses garlic powder in quantities calibrated for strong flavour.
Ripe tomato flesh itself is low-risk for cats in very small amounts (the solanine is concentrated in the leaves, stems, and unripe fruit). The issue with pizza sauce is not primarily the tomato — it is the garlic that is almost always present with it.
The cheese
Mozzarella is the standard pizza cheese. It contains lactose (most adult cats are lactose intolerant), high saturated fat (pancreatitis risk), and meaningful sodium — commercial pizza mozzarella runs to 600–800mg sodium per 100g. The cheese on a slice of takeaway pizza represents a significant sodium load for a cat weighing 4–5kg.
Processed meat toppings
Pepperoni, salami, ham, bacon — standard pizza toppings — are all cured meats with the same problems as prosciutto or sausages: high sodium, nitrate preservatives, high fat, and often allium seasoning in the spice blend used in the curing process. Pepperoni typically contains garlic powder in its seasoning, making the meat topping an additional allium exposure on top of the base.
The crust
Pizza dough is not toxic, but it contributes to the caloric and carbohydrate load without providing anything a cat needs. The concern with raw pizza dough (if a cat somehow accessed it) is more serious: live yeast in unbaked dough ferments in the warm environment of a cat's stomach, producing ethanol and CO₂ — essentially causing rapid intoxication and gastric distension. Baked crust is not an emergency, just empty calories.
The garlic-pizza ordering problem
In Australia, heavily garlic-forward pizza styles are common — garlic prawn pizza, roasted garlic and brie, garlic chicken — and these represent a substantially higher allium dose than a standard margherita. If your cat stole a bite from a garlic-topped pizza rather than a plain cheese slice, the clinical concern is correspondingly higher.
What to do if your cat ate pizza
A brief lick of the pizza box or one small bite: Monitor over 72 hours. Watch for vomiting and diarrhoea in the first 6–8 hours, then for allium toxicity signs in the following 48–72 hours (pale gums, lethargy, dark urine). Ensure access to fresh water.
A slice or meaningful portion: Call the Animal Poisons Helpline on 1300 869 738 immediately. Give the pizza type (plain cheese vs. meat vs. heavy garlic) and the approximate amount consumed. Do not wait for symptoms to appear — allium toxicity treatment is more effective when started early.
🚨 My Cat Ate Pizza — What Now?
If your cat ate a meaningful portion of pizza — more than one bite — call the Animal Poisons Helpline on 1300 869 738. If the pizza was heavily garlic-topped (e.g., a garlic prawn or garlic chicken pizza), treat this as a higher-urgency call. Allium toxicity symptoms appear 24–72 hours later; do not wait for signs to emerge before calling.
Signs that warrant a vet call:
- Vomiting
- diarrhoea
- increased thirst within 2–6 hours. Allium toxicity signs 24–72 hours later: pale or yellowish gums
- lethargy
- weakness
- dark or reddish-brown urine. Any neurological signs if a large amount with very heavy garlic was consumed
If your cat ate a large amount or is showing the signs above: Don't wait — call immediately.
📞 Animal Poisons Helpline: 1300 869 738Available 24/7 across Australia. Have your cat's weight, breed and approximate quantity consumed ready when you call.
Frequently Asked Questions
Only if it is made specifically without garlic and without onion, with very limited salt in the tomato sauce, and with low-fat, low-sodium cheese. A cat-safe homemade pizza would essentially be cooked chicken on plain flatbread — at which point it is no longer pizza by any meaningful definition. The answer is to feed the cat plain chicken and eat your pizza yourself.
For the full picture on allium toxicity and what human foods are and aren't safe for cats, see our cat food safety hub and our guide to can cats eat lasagna for another Italian-food case study.
📚 Sources & Further Reading
- Cope RB. Allium species poisoning in dogs and cats. Veterinary Medicine 2005;100(8):562-566.
- ASPCA Animal Poison Control — Garlic and Onion Toxicity. https://www.aspca.org
- Cornell Feline Health Center — Hazardous Foods for Cats. https://www.vet.cornell.edu
- Australian Veterinary Association — Food Safety for Pets. https://www.ava.com.au
