In green: the path to follow, in red: the holes to avoid. When you fall in a hole, you land in a map with groups of various Tofus, very useful to farm bird meats.

There are only groups of 1 Tofu, you can farm this map without having any malus. To continue the dungeon, you must talk to Kazy Ingalsse(?) and tell him that you want to continue to clean the rest of the Tofulailler(?).