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Such an injury is very difficult for me to assess from afar and then give you a prognosis for recovery. An avian vet (please see here: www.aav.org) will need to carefully examine Diego for signs of trauma - bruising, swelling, pain upon flexion and hyperextension of her wing - and determine if a soft tissue injury or fracture, instead, is present. Treatment, then, would be predicated upon the type of injury suspected. A nonsteroidal antiinflammatory drug (NSAID) might be prescribed for a soft tissue injury while immobilizing Diego's wing might be prescribed for a non-displaced fracture. Tumor associated with the wing is another consideration and can be diagnosed by direct visualization in most cases.
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