Welcome to the real side of owning a Veiled. They can become extremely cage aggressive. It is their space and they want to make sure you understand that. Beman will strike to the point of almost falling off a branch to come at me when I open the cage door. I have to very cautiously watch his behavior and color changes to see what personality I am going to get on any given day. He will still come out on to me willingly but he will go into full display and hostile behavior first when I open his cage door. Once he comes out and we move more than a foot away from his cage he totally calms down and becomes the Beman I raised.
It is one of those things that you just have to really watch them and understand what the reason behind the behavior is. Just him protecting his territory.
I do not limit my interaction as this can make them worse. I still get in each day and spot clean the cage, feed him, pull dead leaves, etc. I do not let him have the upper hand. I respect his space but I still do what I need to do to care for him. If he feels the need to get pissy then that is on him. But it does not cause so much stress that he is going to die from it. I have literally been dealing with his behavior like this the last almost 2 years. He is 3 and a half years old and his behavior started to change around 14-16 months old. It progressively got more territorial.