I called Dr. Stahl's office and the receptionist had no idea so she asked Dr. Stahl personally. His response was along the lines of "thank heavens you don't have birds, but snakes should be ok". He recommended to move them out of that room if they were in it (they aren't, weren't, and never will be in the 6 yr olds room...), and air the house out as much as possible, which is already happening.