From different threads I have read, the seven dust is most harmful if the dust is inhaled by the animal.
Of course, if she put it on all of them, she may be looking at some very sick snakes very soon. :/
I hate to say it, but Kathy Love uses it on her corns, and says it's okay to use. I think that is just wrong to promote the use of it for purposes it is not originally intended.
And people freak out about using PAM?? Just sad... STICK WITH PAM!