"Tests showed that mites were present on the raven, which would cause the bird's extreme feather loss. The veterinary staff treated the bird with an anti-parasitic and administered an anti-inflammatory to treat the skin condition," writes the Wildlife Center.
Although the treatment was successful in wiping out the mites, the raven couldn't be returned into the wild given the state of her feathers, which would take some time to grow back.
"Besides being necessary for flight, feathers serve as part of a bird's thermoregulation (control of their body temperature) and protection from the elements," the center writes. "For these reasons, a bird cannot be released into the wild with insufficient feather coverage."
So, last month veterinarians opted to perform a special procedure to help speed the bird's release - a feather transplant.