As I recall, one of my sister's dogs had a toad-licking "problem". This likely contributed to at least one seizure, but the pup didn't give it up until she had a really bad "trip" on her last toad.
We have Sonoran River Toads here in Tucson, they come out in some of the Monsoon storms. Unattractive and bad for dogs, I don't think there is any human connection.
I had to chase one out of the backyard a few years back. Saw one in the driveway this year. But they are not around much.
yeah, the pup in question lived south of Maricopa, with my older daughter/ursusminor's older sister. The pup was a wolf-hybrid, sweet in nature - but, still, easily 80 pounds, and she had a craving for those toads. My older daughter's a vet tech, and quite knowledgeable on the topic of toads - and, she vigorously would check the pack compound,, but the stoner pup still managed to find the occasional toad.