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  I have never encountered this with my dogs, but I'm thinking Villette has.    From what I remember, dogs coming in contact with toads foam at the mouth a lot, but I don't remember that they threw up.  I guess I'd be a little concerned about that.  If he shows any other signs of distress, maybe you should take him to an ER place...better safe than sorry.
 I hope you can get some more knowledgeable answers!   I'll check for updates!  I hope Tbone does okay!
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