Claim: The flowering plant heliotrope is toxic to dogs and can cause death to those who ingest it.
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Example: [Collected via Facebook, 2013]
Origins: Heliotropium is a genus of flowering plants which includes a few hundred different species commonly known as "heliotropes," the most well known version being a plant that produces pink-purple flowers as shown above. Heliotropes are generally found in the eastern U.S. from Florida up to New Jersey, and sometimes as far north as northern New England.
The ASPCA's Animal Poison Control Center article on heliotropes lists them as a substance which is toxic to horses and can induce liver failure in equines:
The ASPCA's listing does not declare the heliotrope to be toxic to dogs, however. Likewise, other sources mention the toxic effects of heliotrope on horses, pigs, and cows but make no mention of dogs:
tremors, especially of the head and neck; frequent yawning, copper colored or red urine, difficulty or inability to swallow, horses may stop eating halfway through a mouthful of food; horses may stand with their heads held down, head pressing, dragging of the hind legs, causing the hooves to have worn tips, random attacks of frenzy and violent, uncontrollable galloping.
Once an animal begins to show signs of severe intoxication there is little that can be done to stop disease progression and inevitable liver damage. As a result prevention is the best treatment option. Luckily the plant is not very palatable and most animals will completely ignore it unless no other forage is available. Poisonings typically occur from ingestion of the green plant or when the plant becomes a contaminant in hay. Always check hay for signs of contaminants and ensure animals are provided plenty of quality hay and feed, if animals are left to graze ensure the pasture provides plenty of non hazardous plants to forage upon.
A good default is to assume that any plant can be toxic or cause an allergic reaction in your pet. If your dog or cat is nibbling on the leaves of something, take it away and check to find out if it's harmful. The ASPCA lists 448 plants known to be toxic to dogs, cats, and horses, and many of these are common houseplants.
Last updated: 22 April 2013