I got the rads--
part of the problem with reading them is they took two AP views, and they really should have shot at least one lateral or oblique angle. that's the vet's issue, they should know better. since they were reviewed by a radiologist at Antech, did they offer up a more confirmed opinion?
there's quite a bit of soft tissue swelling in the left foreleg, however I do not see a fracture. the second view has an area on the distal ulna's epiphysis that initially looked like a possible fracture, but the first view refutes that. nor is there any obvious infection in the bone (osteomyelitis). his cortices look good and don't show any evidence of MBD.
that leaves gout/pseudogout as the likeliest scenario, unfortunately. depending on what the crystals are made of, some are visible on rads and some are completely invisible. I think you're in situation #2, or it's just too early for the crystals to be detected by xray (gee whiz fact of the day---you need just about one million cells together to be visible on rads. when metastatic cancer views are taken of the lungs to see if a cancer has spread, we can only see the nodules when they get to that size. 500,000 cancer cells could be forming 50 different nodules, but the rads won't pick them up. thus the better sensitivity and specificity of CT's/MRI's).
if it were my cham I would still run a CBC/Chemistry panel to help confirm the diagnosis, and also hope that it shows something else more treatable.....gout sucks. if it were just that one leg I would pray for an infection/cellulitis, but it sounds like you are beginning to see multiple limb involvement, bringing us back to the gout family. not great news, I'm sorry to say.
until you fill out the health history form, no one here is going to be able to give you an idea of what may have caused this. I suggest you fill it out to the best of your ability for some feedback.
o-