Ohio has a policy that one can bring or ship the chicken’s body to the poultry pathology department, but they have to give the written necropsy results to a vet in your area. Then your vet will give you results. That is probably so your local vet can explain the findings, but who knows what the extra cost is. The necropsy itself in OH is just $23 for a backyard chicken, so more affordable than I thought. I am just posting this for interest, even though the OP is in another state (NY.) Cornell is one of the leading centers for veterinary diseases, so it would be great to get testing or a necropsy there if possible.