Hello,
It sounds like you have done a pretty thorough work up. The places I think that you should look into are;
Repeat the blood work. It sounds like hyperthyroidism. I always check a free T4 on top of the thyroid T4. I also check a urine. If you haven’t sent a fecal to the lab too.
After that the ultrasound and X-rays are where I look.
You are still at the place where the diagnosis is eluding you. That’s where you need to focus.
PS. Just for the record I don’t love starting pred until you have a diagnosis. It can obscure your diagnostics.
Good luck. I hope this helps.
Hello,
I’m sorry that you are having so much difficulty finding the cause to this.
There is no way around the fact that some patients come to us with more difficult conditions than others. When we struggle for the answer the best way to get to the bottom of the problem is to get a second opinion and a new set of eyes. I don’t think there is anyway around seeing a new vet and probably spending more money to rerun some of the tests.
The other option is to see if your vet can send the X-rays to a radiologist for review and ask for a vet consult via the lab work provider they use. For cases like this I can lean on a specialist to help me with the difficult cases I see. I use ANTECH and Idexx for my lab services and they both offer online consults for vets. They also both offer radiologists to review my X-rays The phone consult is free and the radiologist review is often about $150. It might help.
Otherwise you are stuck with just trying additional medication to see if they help.
X-rays also have limitations and a CT scab might be needed to see the area of the throat or chest causing the issue. I’m sorry I wish I could help more.