I'm not sure if it's a good idea to keep them as pets.
They are bred to be kept for meat. They are not meant to live longer than 15 weeks at the most. I agree with ChickenCanoe - there are hundreds of other breeds that you can keep for pets and they will be much easier to care for and happier, too. Please don't make chickens suffer when they don't have to.
Also, before chickens were domesticated they lived in the woods....and in the woods there are predators like foxes, bobcats, raccoons, and more! Chickens are naturally very good at keeping there sicknesses and injures from being noticed. So it might be too late by the time you notice something is wrong. And the poor chicken would have been suffering all that time.
Oh, and just to let you guys know. I don't support the making of this breed. It's unnatural and terrible, in my opinion.
(Disclaimer: I'm not trying to start a fight, I'm only stating my opinion on this matter.)