I was reading a little of this and that today, since I couldn't get on here, and ended up at the Wikipedia article on avocados, where I learned that they are toxic to many animals, including house pets. So, no more sprouted avocado pits at floor level around here - my cat bites everything!
Toxicity
Allergies
Some people have allergic reactions to avocado. There are two main forms of allergy: those with a tree-pollen allergy develop local symptoms in the mouth and throat shortly after eating avocado; the second, known as latex-fruit syndrome,[106] is related to latex allergy[107] and symptoms include generalised urticaria, abdominal pain, and vomiting and can sometimes be life-threatening.[108]
Toxicity to animals
Avocado leaves, bark, skin, or pit are documented to be harmful to animals; cats, dogs, cattle, goats, rabbits,[109] rats, guinea pigs, birds, fish, and horses[110] can be severely harmed or even killed when they consume them. The avocado fruit is poisonous to some birds, and the American Society for the Prevention of Cruelty to Animals (ASPCA) lists it as toxic to horses.[111]
Avocado leaves contain a toxic fatty acid derivative, persin, which in sufficient quantity can cause colic in horses and without veterinary treatment, death.[112] The symptoms include gastrointestinal irritation, vomiting, diarrhea, respiratory distress, congestion, fluid accumulation around the tissues of the heart, and even death. Birds also seem to be particularly sensitive to this toxic compound.
The leaves of the Guatemalan variety of P. americana are toxic to goats, sheep, and horses.[113]
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