He even mentions that story (The Lottery by Shirley Jackson) in this short story.It was of the small-town-has-a-crazy-secret stories. A lot like The Lottery (which is not accidental). The toads were creepy AF and I could almost feel those teeth.
Not long after I read this story for the first time, I did a weekend at a Park downstate a bit. At night these huge toads would come out. It would be dark, you'd be walking and step on one. Creeped me right the heck out.
I wonder if something was in the news about this - could have been in the back of his mind
with razor sharp teeth and black slime inside them when you killed them
Not a toad but similar to how I imagined them to look: