With summer in full swing, the generally higher temperatures often mean pets will be spending more time outdoors, but it also means that dog owners must be vigilant of the dangers of lawn chemical, as numerous studies over the past few years have shown strong connections between herbicides and lawn chemicals using 2,4-D, and canine cancers.

The World Health Organization's International Agency for Research on Cancer classified 2,4-D as "possibly carcinogenic to humans."

As the Reuters reported in 2015:

The classification of the weed killer, 2,4-dichlorophenoxyacetic acid, known as 2,4-D, was made by the WHO's International Agency for Research on Cancer (IARC).

The IARC said it reviewed the latest scientific literature and decided to classify 2,4-D as "possibly carcinogenic to humans."

Recent studies have found that lawn chemicals travel to untreated neighboring yards, and inside homes, with chemicals even being found in the urine of dogs whose owners had never chemically treated their lawns.