Avocado is one of the very few everyday kitchen foods that is genuinely dangerous to chickens, rather than simply unhealthy. Most so-called forbidden foods are really just a matter of moderation, but avocado is a proper exception, so it is worth understanding exactly why and knowing what to watch for if a hen manages to grab a scrap.
Can chickens eat avocado?
No. Avocado is best treated as a firm no for backyard chickens. It contains a natural compound called persin, and birds are especially sensitive to it. While a great many foods that get called dangerous are really fine in small amounts, avocado sits in a much smaller group that can cause real harm, so it belongs off the treat list entirely rather than merely rationed.
It is an easy one to slip up on, because avocado turns up in so much of what we eat, from a slice on toast to a bowl of dip. The safest habit is simply to treat the whole fruit as off limits for the flock. If you are drawing up a list of safe scraps, leave avocado off it and fill the gap with something better from what chickens should actually eat. You can browse plenty more everyday foods across our backyard chicken guides.
Why avocado is toxic to chickens
The trouble is persin, a compound found throughout the avocado plant. It is most concentrated in the skin and the stone, but it is present in the flesh too, and in the leaves and bark of the tree. People can eat avocado quite happily because we tolerate persin well, but chickens and other birds are far more sensitive to it, which is why a food that is a health favourite for us is a hazard for them.
In birds, persin can damage the heart muscle and interfere with breathing. Reported effects include laboured breathing, weakness, a hunched and fluffed-up posture and, in serious cases, a build-up of fluid around the heart and death within a day or two. The exact amount needed to cause harm varies with the bird and the type of avocado, and that uncertainty is precisely the problem. Because the risk is real and there is no nutritional benefit that you could not get from a safer food, the only sensible line to draw is never.
Watch out for hidden avocado
Whole avocado is easy enough to keep back, but it hides in plenty of prepared foods, and those catch people out. Guacamole is the obvious one, and it is doubly bad news, because as well as the avocado itself it usually contains onion, garlic and salt, all of which are separately harmful to chickens. Shop-bought dips, some salads and the odd sandwich filling can contain it too.
- Do not scrape avocado toast, guacamole or dip into the scrap bucket.
- Keep skins and stones out of the run and off the compost heap, as hens will happily peck at both.
- Check mixed leftovers before sharing them, in case avocado has been stirred through.
What to do if your chickens eat avocado
Try not to panic. A hen that pecks a tiny scrap of flesh may well be perfectly fine, but you should keep a close eye on the whole flock all the same. Start by removing every trace of avocado from the run, including skins and stones, so no one goes back for a second helping.
- Make sure fresh, clean water is available at all times.
- Watch closely for a day or two for weakness, breathing trouble or a hunched, fluffed-up bird that will not move about with the others.
- If a chicken seems unwell, ring an avian or farm vet promptly and tell them it has eaten avocado.
- Store avocados, peelings and stones somewhere the flock genuinely cannot reach in future.