Can dogs eat avocado?

Why

Avocado has a frightening reputation because of persin, a natural fungicidal compound found in the fruit, leaves, bark and stone. Persin genuinely is dangerous — to birds, rabbits, horses, cattle and goats. Dogs are among the species that tolerate it well, and the flesh contains far less of it than the leaves or bark do. That's why you'll see avocado listed as toxic on some websites while your own vet stays fairly relaxed about a dog who licked out a bit of guacamole.

The problem that actually sends dogs to the clinic is the stone. It is large, smooth, hard and almost exactly the wrong shape — too big to pass comfortably through the gut in many dogs, too tough to break up, and just tempting enough to look like a ball. A swallowed stone can lodge in the throat, the oesophagus or the intestine, and an intestinal blockage is a real emergency that often needs surgery. Small dogs are at the highest risk simply because of plumbing size, but stones have caused obstructions in big dogs too.

The second real issue is fat. Avocado is one of the fattiest fruits there is, and dogs aren't built to handle a sudden load of rich food. A generous helping can mean vomiting, diarrhoea and a very uncomfortable night. In some dogs — particularly those who are overweight, older, or have had a bout before — a fatty meal can tip them into pancreatitis, which is painful and needs veterinary treatment.

Worth flagging separately: the way avocado usually arrives in a house is as guacamole, and guacamole normally contains onion and garlic, which are properly toxic to dogs. If your dog has eaten guacamole rather than plain avocado, it's the onion and garlic to ring your vet about, not the avocado.

How much is sensible?

If you want to share, treat plain avocado flesh as an occasional titbit rather than a regular part of the bowl — think a small cube or two for a Labrador, a single small piece for a terrier, and not every day. Peel it, remove the stone entirely before it's anywhere near the dog, and serve it plain: no salt, no lime, no onion, no garlic, no seasoning of any kind. Keep it within the usual guideline that treats and extras stay under about 10% of your dog's daily calories, and bear in mind that avocado's fat means a little goes a long way against that budget. If your dog has ever had pancreatitis, is on a low-fat diet, or has a delicate stomach, skip it altogether — there's nothing in avocado they can't get more safely elsewhere.

Signs to watch for

• Retching, gagging, drooling or pawing at the mouth straight after eating — the classic picture of something stuck in the throat
• Vomiting, sometimes repeatedly, and turning down food or water
• Loose, greasy or foul-smelling stools, or straining with nothing coming out
• A hunched, tucked-up posture or a stretch with the chest down and bottom in the air — a sign of belly pain
• Lethargy, restlessness, or a dog who can't settle anywhere
• A swollen or tender tummy they don't want you to touch

If your dog has had too much

If your dog has only had a small piece of plain avocado flesh, there's no need to panic — keep an eye on them over the next day or so and expect nothing worse than a soft stool. If they've eaten a large amount, or any guacamole containing onion or garlic, ring your vet and tell them what and how much. If you think they've swallowed the stone, or you simply can't account for it, ring your vet straight away rather than waiting to see what happens — an obstruction is far easier to deal with early, and a dog who has swallowed a stone can look completely normal for hours before things go wrong. Don't try to make your dog sick unless your vet specifically tells you to. And if you see repeated vomiting, belly pain, or a dog who has gone quiet and flat, that's a same-day call to your vet whatever they ate.

Serving tips

• Deal with the stone the moment you cut the fruit — into a lidded bin, not the open kitchen bin and not the compost heap, where a determined dog will find it.
• Skip guacamole entirely as a sharing food. It almost always has onion or garlic in it, and those are a genuine toxicity problem in a way the avocado isn't.
• Serve it plain and peeled if you share at all — the skin is tough, hard to digest and has no business in a dog.
• If you grow avocados or keep the plant indoors, fence it off or move it. The leaves, bark and fallen fruit carry far more persin than the flesh, and windfalls come with stones attached.

Common questions