Toxicity to pets

Water hemlock is one of the most toxic plants in North America with one species growing in every state and province. Dogs, cats and grazing animals are all at risk, even with small ingestions. The roots contain the greatest amount of toxin. Water hemlock causes rapid and severe neurologic signs that can progress to respiratory failure and heart rhythm abnormalities.

Obtaining a correct plant identification is essential as Water hemlock is often confused with other non-toxic plants and is not the same plant as Poison hemlock. If you suspect your pet has ingested water hemlock, seek emergency veterinary care right away. Treatment should be instituted until a reliable plant identification can be made. If possible and it can be done quickly, collect a sample for identification and/or take a few pictures, both up close and at a distance.