Jamie, welcome to Greytalk, I'm sorry that the reason is Harley being in pain. He looks so sweet. As Batmom said, I would absolutely not wait for more x-rays, if he is in that much pain ask the vet to add to the current pain med until you know what is going on. By all means Harley should be seen by an oncologist or at least by an orthopedic vet and the x-rays need to be read by a radiologist. Also, as Batmom suggested get in touch with Ohio State University and Dr. Couto's group. They are the experts in pretty much anything greyhound an especially in osteosarcoma. Dr. Couto will consult with you and your local vet and will read the x-rays and he will not charge for this.
Dr. C. Guillermo
e-mail Couto.1@osu.edu
e-mail greyosu@osu.edu
(614)292-3551 phone
(614)292-6464 fax
Sending prayers for Harley.
If you cannot locate an oncologist or a radiologist The University of Missouri-Columbia should be able to help you locate specialists. They have a teaching hospital and their small animal clinic should have specialists from all disciplines. link to U of M info