object linking with Object.create()

gistfile1.js

var Animal = {
  sayHello: function(){
    console.log('Hello from ' + this.name);
  }
};

var Cat = Object.create(Animal);
Cat.init = function(name){
  this.name = name;
};

var fatty = Object.create(Cat);
fatty.init('Fatty');

var skinny = Object.create(Cat);
skinny.init('Skinny');

fatty.sayHello();
skinny.sayHello();

console.log(Cat.isPrototypeOf(fatty));
console.log(Cat.isPrototypeOf(skinny));