Hey lads and lasses, I'd like to tell you the story about one of my cockatiels.
We rescued him from a cats' home in Norwich - he had been left on the steps by someone who no longer wanted him. He was in a tiny cage, where he couldn't even stretch his wings, and he rocked backwards on forwards on his one and only perch. It was a heart-breaking sight.
He was in such a state, we were worried he wouldn't survive the long car journey home - but he did, and hubby built him an aviary in our garden. In time we rescued other cockatiels, which were company for him, and he started showing signs of a normal, happy bird.
This was about ten years ago, and he is still with us. :o)