Can dogs eat mozzarella?

The detail

Mozzarella is a fresh, unripened cheese, made and eaten within days rather than aged for months like cheddar or parmesan. USDA composition data puts whole-milk mozzarella at around 22g of fat and 486mg of sodium per 100g, against roughly 33g of fat and 653mg of sodium in the same weight of cheddar, so gram for gram it is the gentler cheese on both counts.

That lower fat and salt content is mozzarella's genuine advantage over most other cheeses, not a reason to treat it as a health food. PDSA's pancreatitis guidance lists cheese among the high-fat foods that raise a dog's risk of the condition, and mozzarella's lower numbers are a smaller version of the same risk, not an absence of it.

Fresh mozzarella is often sold sitting in a salty brine or whey liquid, which is worth draining off rather than sharing, since that liquid carries a concentrated dose of the cheese's salt. Block or grated mozzarella sold for cooking, sometimes called low-moisture mozzarella, skips the brine and is the simpler option to keep for occasional dog treats.

Like most cheese, mozzarella carries far less lactose than a glass of milk, since much of the milk sugar is drawn off with the whey during cheesemaking. Most adult dogs handle a small piece without trouble, though a dog that reliably gets a soft stool after dairy has already given you its answer.

Fresh mozzarella vs block mozzarella

A ball of fresh mozzarella sits in a salty brine or whey liquid to keep it soft, and that liquid is worth draining and discarding rather than pouring over a dog's dinner. The cheese itself is fine in a small piece once it is out of the liquid.

Block or grated mozzarella, the low-moisture kind sold for cooking and pizza, skips the brine step entirely and is marginally lower in salt as a result. Either version works as an occasional treat once cut into a pea-sized piece.

Mozzarella sticks and breaded cheese

A mozzarella stick is deep-fried cheese in a breaded coating, which adds a meaningful amount of extra fat and salt on top of the cheese itself. One stolen from a plate is not an emergency, but this is a food to keep off the sharing list rather than a version of mozzarella worth offering on purpose.

Check any dipping sauce that comes with it, too. Garlic mayonnaise and some marinara sauces carry onion or garlic, and Vets Now lists onions, garlic and chives among the foods that damage a dog's red blood cells.

Mozzarella on pizza

The cheese itself is the least of a pizza's problems for a dog. A takeaway pizza usually carries a heavy dose of salt in the base and sauce, plus toppings such as onion, garlic, pepperoni or chorizo that bring their own risks on top of the mozzarella.

A pizza crust with a scraping of plain mozzarella is a much smaller worry than a slice with full toppings, but a hot slice straight from the box is also a burn risk to a dog's mouth, so let it cool first if you are sharing any of it at all.

Mozzarella compared with cheddar and other cheeses

USDA figures put mozzarella at around 22g of fat and 486mg of sodium per 100g, against roughly 33g of fat and 653mg of sodium in cheddar, a meaningfully lighter option gram for gram. Cottage cheese and ricotta run lower still, worth considering if a dog needs a low-fat option for a longer stretch of training.

Blue cheeses sit at the opposite end entirely. The Royal Kennel Club warns that Roquefort and other blue cheeses contain roquefortine C, which can trigger tremors and seizures, a risk mozzarella does not carry at all.

Mozzarella as a training treat or pill hider

A pea-sized piece of mozzarella works well as a high-value training treat, and its lower fat content makes it a slightly better everyday choice than cheddar if training sessions are frequent. It also works as a pill hider for a dog that spits out plain tablets.

The habit to avoid is grating cheese over a dog's dinner as a matter of routine. That turns an occasional treat into a daily fat and salt addition, which is exactly what the portion table above is meant to prevent.