The cross beaks often recquire help in eating and I would suggest you concentrate this birds nutrition to help it get back on track if you choose to keep it...add baby parrot formula to its feed.
http://harrisonsbirdfoods.com/learningcenter/BestOf2.pdf
"Use of Penetran for Beak Malocclusion Greg J. Harrison, DVM Dipl. ABVP Avian"
(excerpt)
Topical application of Penetran is effective for avian skin rashes, local irritations and ulcerations. It can be mixed with aloe vera liquid for...