Glad to know she's recovered. Its odd she self mutilated without overpreening or plucking anything else. I think if she were mine, I'd focus on foraging toys, some simple trick training to keep her brain engaged and maybe try to take her on an outing a few times a week if she handles that sort of thing well. All that sort of stuff does wonders for my large cockatoo when she starts to get a little weird and obsessive about things. Although, considering the lack of other plucking and very sight specific mutilation, I'd wonder if its something physical rather than behavioral. Hopefully whatever it is has resolved itself.