Diseased Bird: Deformed or sick male Northern Cardinal

This unfortunate male Northern Cardinal stopped by our deck feeder today during a small snowstorm. His eyes appear to be popping out of his head. He is missing a lot of plumage as well. I thought he may have been a victim of an attack by either the stray cats that come by occasionally or any number of hawks we have seen in the area lately. The other possibility is that he could be sick or have a deformity.