cat.rb

class Cat
  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 am hungry"
    else 
      puts "I am full!"
    end
    @hungry
  end

  def speak
    puts "Meow!"
  end
end

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

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

dog.rb

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 Dog < Pet
  def speak
    puts "Woof!"
  end
end
puppy = Dog.new("Black", "German Sheppard")
puts "I say..."
puppy.speak
puts "Because I am a..."
puts puppy.breed
puts "My color is..."
puts puppy.color
puts "and..."
puts puppy.hungry?

Great.