In 1998 I got a new cage for Wendell (He is now 13 years old) It was one of these wonderful Grant Lake cages (they went out of business a long time ago, they made their cages in NE Oklahoma, rather than import them from somewhere.)
Wendell is at least as destructive as the average cockatoo, and the thing is still in perfect condition.
AT any rate within a few days of my getting this new cage Wendell saw me opening the latch on the door, and realised that all had to do is reach out with his hand and pull up the latch and he could get out. Again, Wendell is a notoriously destructive bird, so I was lucky I was home when he learned this. I put a padlock on his cage, which he instantly learned to hate. If he has a chance to get at the padlock he will throw it with all his might, try to crunch it with his beak, do anything in his power to destroy it.
From the instant he learned this, he would always open the door instantly unless there were a padlock on the latch!!
Within seconds of my removing the padlock he has the latch opened. The door has two latches, I only put a lock on one, but he seldom unlatches the unlocked latch if he sees the padlock on the other one!!! He, amazingly enough, realises that it is futile to do so.
What is interesting is that every now and then he tries a new approach to opening the latch. Today instead of reaching out with his hand for the latch, he tried to push the latch up from the bottom. After he discovered that this new technique would not work, he opened it his usual way!
When I put the lock on the cage I have to be careful, because he would certainly bite if he had a chance, he is annoyed by my putting the lock on his cage. (Even when he is in a friendly mood.)
I also put a padlock on his feed cup doors, because I fear he might open them too.










