Lawn Chemicals Linked to Cancer in Dogs

A study from Purdue University compares Scottish Terriers with and without chemical-treated lawns. They found:


  • The dogs exposed to herbicides (weed killers) had 3 1/2 times greater risk of bladder cancer.
  • The risk doubled (to over 7 times more likely) when the dogs were exposed to both herbicides and insecticides.
  • A group of chemicals, known as phenoxy herbicides, were of highest concern.

The most common phenoxy herbicide, 2,4-D—found in products such as Weed-B-Gone, Barrage, Savage, Weedtrine-II—has also been linked to canine malignant lymphoma.


A study published in the Journal of the National Cancer Institute found that four or more lawn applications of 2,4-D per year raised the risk of cancer to twice that of dogs living in households that didn’t use 2,4-D.


Encourage a naturally green and weed resistant lawn by using non-synthetic fertilizers, proper watering and mowing techniques, and eliminating the use of toxic pesticides. Learn how: Tips for Natural Lawn Maintenance. Your dog will thank you.

Published on August 16, 2010