Hi Honeybee. I'm so glad that your dog is still here and holding his own!

I don't have enough expertise in health charts to answer your question, and where health is concerned the issues are too important to hazard a guess - but I do know that all the systems of the body are related, and imbalances in one will often show up as symptoms in another. The liver is the major clearing house and detoxifier for the body, so liver enzymes in blood tests are often askew - even when the main problem lies elsewhere. Heart and lungs are intimately related, so a problem in one will often accompany symptoms in another. This might well account for the confusion your dog's vets have experienced in diagnosing him.

My best advice would be to discuss your dog's previous diagnoses with the new vet, and try to find points of agreement between all of them that might establish what the basic issue is.

I wish you and your boy the very best!

Yes it's good to hear that your dog has been doing well.
The AC describes the dog's body and his health. Look at the 6th house for his illness(the sign on the cusp, Lord 6, planets in the 6th) and also the planets afflicting the AC, if any.

In the first chart, Mercury is very slow, nearly stationary, indicating that this condition will last for a while. But once Mercury turns direct in motion, though likely to be slow in recovery till it regains the speed, it's good that Mercury is strong and dignified in his own domicile.