compose.rb

class Wolf < AR::Base
  include Movable
end

module Movable
  def some_movement_method
    # like maybe accessors for Location relation
  end
end

module Mover # or Map or something
  def self.move!(movable)
    # ...
    movable.location = some_new_location
    # ...
  end
end

Mover.move!(Wolf.new)