Thankfully, double yolks are much more common than the reproductive issue my other one had. I definitely wouldn't wish that to be a constant! Poor little chicken.
Dogs are the best! If only roosters were as easy to train.
Side note: when I was little, I had a black pet pig named Salty. She was a house pig and we trained her to use the dog door to go potty. She was adorable and super easy to train. Unfortunately we learned the hard way that there's no such thing as teacup pigs.... she grew HUGE and started charging anyone not in the family so we have to give her up.