Much to my dismiss, my Ana Grey's breeder clipped her wings before I purchased her. Ana Grey is great about climbing all over the inside and outside of her cage, she even hangs upside down inside her cage. She climbs out the door and goes to the top of her cage and crosses over on her rope bridge to her cargo net without any problems. Sydney does climb around in his cage I assume so he should be able to go all around his cage inside and out if he wants to. Does Sydney have a favorite treat? Ana Grey loves pecans and peanuts, if I want her out I just ask her if she wants one and out she comes. If I have her in the living room and she wants to go to her cage, which is in my office, she just glides down to the floor and walks back to her cage and climbs up the furniture to get back in. I have a seed guard around the cage and she manages to get up that too. They are very intelligent and it is amazing to watch her figure out how to get where she wants to go. I can't wait until she can fly so I can quit worrying about her. If I were in your situation, I would put some of Sydney's favorite treats outside his cage, not far away, where he can see them. Tell him they are for him and see if he will try to get them on his own. Just make sure there is an easy route he can take to get there. It might take awhile for him to come out but I can't believe he wouldn't if he feels safe and comfortable. Of course this venture is supervised by you so he doesn't come out and get in trouble. Good luck, in the end, Sydney's companionship will be so worth the effort.