> I thought that, obviously, rabbits and dogs couldn't occupy the same space farmer, fox, chicken, and grain, and only three of them can fit in the rowboat f

> I thought that, obviously, rabbits and dogs couldn't occupy the same space farmer, fox, chicken, and grain, and only three of them can fit in the rowboat foxes eat chickens and chickens eat grain would be a nice type of constraint OP could add to the puzzles