He thinks???he thinks it is most likely Inclusion Body Disease
It no longer that hard to diagnose there is a test for IBD which has been around for a few years now, obviously that was not done or he would not think, he would know.
Try to get in your vet to get in touch with the vet school of the university of FL to see how to proceed about the test and have your vet send the blood out there for testing
Dr Elliott Jacobson
jacobsone@ufl.edu
PO Box 100126
2015 SW 16th Ave
Gainesville, FL 32610-0126
352-392-2226
FAX: 352-392-6125