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7 foods pets should never eat

By: Shea Gunther on July 22, 2011, 11:50 a.m.
close-up of sliced avocado

Photo: sean dreilinger/Flickr

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Avocados made the ASPCA's 2009 list of foods to avoid giving to animals, thanks to a substance called persin that's extremely toxic to animals. It's not only the edible flesh of the avocado that's worrisome when it comes to your pets; the entire avocado plant — the seed, bark and leaves — contains persin and can sicken and kill any animals that partake of it. If you keep avocados in the house make sure to keep them well out of the reach of your animals.