I love them! I currently own 12 rescues that I obtained 12 years ago. One has seizures on occasion, one looks like a zombie cockatiel he is so old! Another is a 'frilled' piebald-he has curly feathers. Two are Lutinos and the rest are grays. The youngest is 20 years and the oldest is ??? possibly 30 years old. I love the sound of cockatiel chatter.