Yes, the Vitamin A business with frog tongues is quite infamous now in dart frog circles and Kurt has had some experience of it first hand. Personally I have never encountered it and the only frogs I have ever supplemented with vitamins are African Bullfrogs, Pacman frogs and darts, and only the darts ever get it religiously. I think we're all just trying to speculate what could cause a prolapse - I'm thinking it's more likely a physical issue rather than a physiological?