class Pet
	attr_reader :color, :breed
	attr_accessor :name

  def initialize(color, breed)
  	@color = color
  	@breed = breed
  	@hungry = true
  end

  def feed(food)
  	puts "Mmm, " + food + "!"
  	@hungry = false
  end

  def hungry?
  	if @hungry
  		puts "I\'m hungry!"
  	else
  		puts "I\'m full!"
    end
    @hungry
  end

end

class Dog < Pet
	def speak
		puts "Woof!"
	end
end

puppy = Dog.new("black","Staffordshire Terrier")
puppy.speak
puts puppy.breed