They may not know anything about chickens, but any vet should be able to collect a sample to send to a lab.I talked to 2 local vets and none of them know jack all about chickens really lol, so this lady who comes into my store told me to try a light solution of bleach and spray there eyes twice a day and see if that helps at all with the swelling some of my birds look healthy but are still making a gurgling noise when they breath