Personaly I would go would go out to the pond with her and catch some snakes, hold some, let her touch them and possibly get her to hold one herself, let her see first hand that arent monsters, would possibly be an educational experience for her, especialy when dealing with wild Snakes since she may have the "its a pet and harmless" mentality if you were to use a Snake from your collection. She may come around, or not, but I think it would be worth the effort if there is a chance you can save a bunch of Snakes.
If that dont work try the Wolves and Tigers thing