compose.rb

class Wolf < AR::Base
  module Movable
    include GeneralMovingMethods
    # here would be specifics about wolves moving
  end
end

class Rabbit < AR::Base
  module Movable
    include GeneralMovingMethods
    # here would be specifics about rabbits moving
  end
end

module GeneralMovingMethods
  def whatever
    # some general stuff
  end
end

Rabbit.new.Movable.move