The OP did say they were interested in determining what the problem was. I assumed (imho) the concern was achieving an economically sound cure rather than a curing.
The meat bird subject line does, on occasion, whet my appetite.
Did you by any chance call UC Davis? They might be able to refer you to someone closer and cheaper.
http://www.vetmed.ucdavis.edu/vmth/small_animal/cape/default.cfm