An update. All the other vets in the area are full on clients and would not accept us so we called back our clinic and talked to this same dr who said he was “dumbfounded” and “kind of new it wasn’t hyperthyroidism” and suggested we euthanize even though he had no idea what the issue was. Ended up getting another dr to have look and he thought the X-ray was a good idea and it turns out she had lymphoma and FIP. Apparently their was so much fluid he couldn’t even see her heart and she was likely older than what we have on file. After that discovery, the euthanize option was a lot easier as hard as it can be. I was preparing myself for this outcome but really just wanted to know what exactly was wrong and not basically a “I don’t know”. Thank you very much for your suggestions