Easy way to do this is to start a new game, trying just to focus on hunting bunnies.
Start your base and try to gather people and convert them to archers. You will probably have one side of your camp better than the other to work for bunnies. The idea will be to chop the trees wherever is not the refugee camp (from were you recruit new people with coins), so it will be a lot of green space / grass to the bunnies appear and jump.
You will need just two lumberjacks to cut down the trees on the first day and the rest of the job will be done by the archers on the next days.