Can dogs eat spinach?

Spinach contains more oxalic acid than most leafy greens. In the gut, oxalates bind to calcium, which reduces how much calcium is absorbed and can add to the formation of calcium oxalate stones. A healthy dog eating a few leaves now and then is not at meaningful risk. A dog eating a cupful every day could be.

Breeds such as Miniature Schnauzers, Bichon Frises and Shih Tzus are known to be more prone to calcium oxalate stones.

Wash the leaves well and chop them finely. Steaming for a minute softens spinach and makes it easier to digest. For a 10 kg (22 lb) dog, a small handful of chopped leaves once or twice a week is a sensible limit. Baby spinach is tender and needs no cooking.

Frozen chopped spinach is convenient: thaw a small spoonful, squeeze out the water and mix it through the meal. Avoid frozen spinach sold with added cream or seasoning, which is common in some supermarket ranges.

Creamed spinach contains butter, cream and often nutmeg or garlic. Spinach and feta pastries are salty and fatty. Saag dishes are cooked with onion, garlic and spices. Spinach dip is loaded with dairy and seasonings. Plain leaves are the only version worth sharing.

Spinach is not for dogs with a history of bladder stones, kidney disease or a prescription urinary diet, unless their vet approves. For them, cucumber, green beans or courgette are safer green treats with little oxalate.