I can't imagine harnessing a Cockatiel. They are so small and fragile. Mine get to experience the "great outdoors" through an open window (with a screen), and that's it. There are too many bad things that could happen and I'm not willing to take the risk. We have enough "risk" just having them out in a closed room with dogs and cats in this house. I take mine to the vet about every six months to have their wings clipped, too, for their own safety. It's worth the money to me, to have them clipped, rather than me trying to do it myself.

Logan