class Pet
	attr_reader :color, :breed
	attr_accessor :name

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

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

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

class Cat < Pet
	def speak
		puts "Meow!"
	end
end

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

kitty = Cat.new("grey", "Persian")

puts "Let's inspect our new cat:"
puts kitty.inspect
puts "What class does our new cat belong to?"
puts kitty.class
puts "Is our new cat an object?"
puts kitty.is_a?(Object)
puts "What color is our cat?"
puts kitty.color
puts "Let's give our new cat a name."
kitty.name = "Betsy"
puts kitty.name
puts "Is our cat hungry now?"
kitty.hungry?
puts "Let's feed our cat."
kitty.feed("tuna")
puts "Is our cat hungry now?"
kitty.hungry?
puts "Our cat can make noise."
kitty.speak

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

puppy.speak
puts puppy.breed