Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
Also animals of equal value can eat each other, mouse cannot attack from the lake, no animal can occupy it's own den and any animal in a trap can be eaten by any other animal. Maybe that's all, Redsales could check the Chinese rules if there's any doubt.