A large, slow-moving toad in your yard may look harmless, but in parts of Florida, it could be deadly. Cane toads, also known as Bufo toads, an invasive species found across South and Central Florida, are cause for concern because of the serious threat they pose to pets. For dog owners, even a brief encounter can turn into a life-threatening pet emergency. Cane toads secrete a powerful toxin from the glands behind their eyes as a defense mechanism.