Pizza
CautionThe dangerous part of pizza is not the cheese, it is the sauce. Marinara almost always contains garlic and onion, and allium toxicity survives the oven, then shows up as hemolytic anemia three to five days later.
This food guide has not been reviewed by a veterinarian. It summarises general information from sources and should not be used to decide whether a food is suitable for an individual dog or to assess an emergency.
Check before feeding
Check the precautions before sharing
Risk depends on preparation, ingredients or amount. Read the precautions below; body weight alone cannot establish a safe portion.
Signs and health concerns
This list includes both observable signs and conditions identified through examination or testing. It cannot establish the cause or whether an exposure is safe.
- Vomiting
- Diarrhoea
- Abdominal pain
- Lethargy
- Loss of appetite
- Increased thirst
- Pale gums or mucous membranes
- Jaundice
- Haemoglobin in urine
- Rapid breathing
- Hunched or prayer-like posture
- Pancreatitis
More about this food
If your dog made off with a slice, the hazards rank in this order: the sauce, the fat, the sodium.
The sauce comes first because of allium. Commercial pizza sauce and marinara are built on garlic and onion powder, and garlic-butter crusts, garlic dipping cups and onion-heavy toppings push the dose much higher. Merck states plainly that allium toxicosis has occurred after ingestion of raw, cooked, dehydrated or granulated onion and garlic, so baking at 500 degrees changes nothing. Clinical signs in dogs are reported from 15-30 g/kg of raw onion, and garlic runs 3-5 times more potent than onion, with dried powder more concentrated per gram than the fresh bulb. The timing is what catches people out. Oxidative damage to red cells begins within 24 hours and peaks near 72, but hemolysis typically declares itself 3-5 days after exposure. A dog that seems fine tonight is simply early. Pale gums, lethargy, rapid breathing, jaundice and port-colored urine are late signs.
Second, fat. Cheese plus pepperoni, sausage or bacon makes a slice extremely high-fat by canine standards. AKC warns that too much cheese can lead to pancreatitis, a serious and potentially fatal illness in dogs, and that a single large helping of fatty food can be enough to set off an attack. Watch 6-48 hours for repeated vomiting, appetite loss, abdominal pain and a hunched back. A lactose-intolerant dog can get diarrhea from the cheese alone.
Third, sodium. Between the crust, the sauce and the cured meats, a slice of delivery pizza carries roughly 500-900 mg of sodium. Merck sets salt toxicosis signs at 2-3 g/kg, so one slice will not reach that, but excess thirst and urination are likely, and any dog on a sodium-restricted cardiac or renal diet has no room for it. Separately, if your dog ate raw pizza dough rather than baked pizza, that is a different emergency: the dough keeps rising in the stomach and ferments into ethanol.
Write down what kind of pizza, how much, whether garlic or onion toppings were on it, the time, and your dog's weight, then call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435. Even with no symptoms, check gum color and urine color daily for five days and ask whether a CBC at 24 and 72 hours is warranted. Do not induce vomiting at home, and do not remove the water bowl after a salty meal.
Frequently asked questions
- He ate a slice an hour ago and seems completely fine.
- Fine at one hour tells you nothing about the allium risk. Hemolysis from the garlic and onion in the sauce usually shows at 3-5 days. Call your veterinarian with the amount, the time and your dog's weight, and check gum and urine color daily through that window.
- I only gave him the cheese off the top.
- That avoids the sauce, but cheese on its own is high in fat and sodium. A lactose-intolerant dog will get diarrhea, and a large amount raises pancreatitis risk. If you want to share cheese, use a small cube of a low-fat option like mozzarella or cottage cheese instead of pizza cheese.
- What if he only ate the crust?
- Plain crust is mostly salt and empty calories, but a garlic-butter crust or one dunked in garlic sauce carries the full allium risk and needs the same 3-5 day watch. If what he ate was raw, unbaked dough, call your veterinarian immediately, because dough expands and ferments in the stomach.