From my mate
wiki QUOTE (Wikipedia)
Avocado (Persea americana) is a tree and the fruit of that tree, classified in the flowering plant family Lauraceae.
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The pear-shaped fruit is botanically a berry or drupe, from 7 to 20 cm long, and weighs between 100 to 1000 g. It has a large central seed, 3 to 5 cm in diameter.
And don't share your guac with pets, it continues
QUOTE (Wikipedia)
Feeding avocados to any animal should be totally avoided. There is documented evidence that animals such as cattle, horses, goats, rabbits, birds, dogs, cats, and even fish [3] [4] can be severely harmed or even killed when they consume the leaves, bark or fruit. Avocados contain a toxic fatty acid derivative known as persin [5] and many animal organizations recommend total avoidance of all parts of the plant. The symptoms include gastrointestinal irriation, vomiting, diarrhea, respiratory distress, congestion, fluid accumulation around the tissues of the heart and even death. Birds seem to be particularly sensitive to this toxic compound.