I recently got a feather teather that was on sale for only $5 or something like that. It's for Kei, but I'm worried about his safety. I won't have to use it for a while (it's too cold) but I've never brought him outside without a carrier. He is fully flighted, and can be slightly "flighty" if he gets scared. I know that I've heard good things about the aviator harness, but I'm not sure if I've heard any reviews about the Feather Tether. Are Feather Tether's safe? If a bird tries to take off, will it stop them without hurting them?