My dog and my friend's dog

I will comrare my dog and my friend's dog. I have a dog. My dog is four years old. He is not smart. He eats very well. My parents love him. They give a lot of food. So he is fat. I’m angry them. I think they love too much him. My friend’s dog is ten years old. She has a license of the police dog. So she is very smart and pretty. I like her. I want my dog to be smarter.