I am having trouble completing puzzles 11 and 12. I need a chief, but the villager I have who is closest to becoming chief needs more "experience" with healing. My problem is my villagers hardly ever get sick. Mostly they get old and die. I have seen on other forums that poison frogs appear making villagers sick and can then be healed. I don't have any poison frogs. Does anyone know how or when they appear? My game will not progress until I can get a chief.