Catching calls to an undefined method

Animal.new.say_moo > "Cannot call say_moo on Animal""> Animal.new.say_moo > "Cannot call say_moo on Animal""> Animal.new.say_moo > "Cannot call say_moo on Animal"">

class Animal
  def method_missing(method, *args, &block)
    "Cannot call #{method} on Animal"
  end
end

=> Animal.new.say_moo 
> "Cannot call say_moo on Animal"