Oak trees are found all throughout Europe, North America, North Africa, and Asia. They come in all different forms and sizes, and according to the University of Florida’s Gardening Solutions page, “Oak (genus Quercus) is comprised of 400−600 species.” Quercus “comes from the Latin name for “oak” and is formed from two Celtic words: quer meaning “beautiful” and cuez meaning “tree.” Oak trees are most known for their falling seeds known as acorns, which drop August through October.
While the idea of keeping certain animals away from acorns might be something you haven’t thought of before, it is important. If you have oak trees and any of the animals susceptible to acorn poisoning on your property, it’s best to keep an eye on them and routinely clean areas where they roam. A Bag-A-Nut Acorn Harvester makes that task fun and easy.
Are acorns poisonous to…
Alpacas
No. Alpacas can consume acorns as a treat. They’re able to enjoy the nutritional benefits of acorns without being poisoned by the tannins. They probably won’t eat them often because they prefer to eat grass and hay for the most part.
Cattle
Yes. Acorn poisoning in cattle has been known for some time. When they ingest large amounts of acorns, the first symptoms include loss of appetite, excessive thirst, constipation followed by diarrhea, and emaciation. Tannin acids irritate the digestive system causing organ damage, which may lead to sudden death.
Chickens
Yes. Chickens are also curious eaters and will try anything. Acorns can cause health problems in chickens, so they should be avoided.
Dogs
Yes. If a dog consumes a large quantity of acorns over an extended period, this could make them sick. The size and hard texture isn’t ideal for a dog’s digestive system. For these reasons, they should avoid eating acorns.
Donkeys & Mules
Yes, these animals should also avoid acorns because of the acidic tannins.
Goats
Yes. Goats have the reputation of being able to eat anything, but that’s not necessarily true. There are many plants that are poisonous to goats, and acorns are one of them for similar reasons to sheep and cattle.
Horses
Yes. Like dogs, a horse would have to consume many acorns over a substantial amount of time to get sick. Since horses are grazers, they might be at risk of consuming acorns, so the best course of action would be to keep their grazing area clean so they won’t be tempted to munch on them. More details
Llamas
Yes, llamas should avoid eating acorns also.
Pigs
No. Pigs enjoy eating acorns and will often forage for them when given the opportunity. Acorns are often a staple food source for creating delicious Jamón ibérico. (note: pot belly and mini pigs can have complications from consuming acorns)
Rabbits
Yes, acorns may cause rabbits to suffer from digestive issues as well.
Sheep
Yes. Sheep are affected by tannins in a similar way to cattle.
Turkeys
No, acorns are fine for turkeys to consume.
Further reading
Oak Trees – Gardening Solutions (ufl.edu)
Should You Keep Dogs Away From Acorns? | VMBS News (tamu.edu)
Local Plant Toxicities of Livestock | OSU Sheep Team
The Truth About Acorn Toxicity and Horses | Cummings School of Veterinary Medicine (tufts.edu)
Michigan Trees Toxic to Horses, Donkeys, and Mules – MSU Extension





