I'm so sorry to hear that Jimmy is doing so poorly. I'm glad that you've decided to take him to a holistic vet and hopefully this new vet will be able to make him feel better. He may need an acupunture treatment which has really helped my Starr.

Starr's still on some herbal supplements for his colitis/IBD/food allergy problems and he's taking Primal Defense which is a probiotic formula by Garden Of Life and he's also taking GI-Encap by Thorne Research and Feline Geriatric Basic Nutrients by Thorne Veterinary. They come in a powder form so I can just mix them up in his wet food. He also has to be on a grain free diet.

From the symptoms that you've described my first thought was that he could have hyperthyroidism because of the wheezing and weightloss. I sure hope that whatever it is that it's not serious and is easily treatable. Please continue to keep us updated about him. I'll keep him in my thoughts and prayers.