Urgent

My vet and I are in need of all the advice, thoughts, or differential diagnoses we can get. My dog Kassi has some sort of infiltrative lung disease. My vet was 99% positive it was blastomycosis but the urine test came back negative today after being overnighted. Her WBC are through the roof but her RBC are WNL. Her Chem panel was pretty unremarkable and she doesn't have any other medical issues. She is eating and drinking as normal, but she is tired and SOB. She gets winded walking around the house, but is still able to breathe with a closed mouth. She is not yet panting but you can tell that she is having difficulty. My vet is unsure and scared for her at the moment, so she is trying to get me into a internal medicine specialists but they are booked out pretty far. So, we are both reaching out everywhere we can to get ideas on what it could be. I don't want to lose her 💔

Hello!  I'm sorry that things are so scary at the moment.  Regarding second opinions, we are fairly clear on this site that we do not offer them; this scale of radiograph on a smartphone or computer is not really clear on the detail, and your own vet knows more context of detail of the presentation than we do, even with your description, which by the way is excellent.  Usually the next stage if your vet is unable to interpret a radiograph, would be to speak to a special in internal medicine or radiography, who would help them to interpret it and suggest treatments, so we are glad that this is in progress although I hear that the turnover speed is frustrating.  These would be people who are specialists in their field and in a suitable position to comment.   As a poor second, your vet will have peer review resources available to the for veterinary discussion of radiographs, even informally online eg social media.  In general, giving a moment's scan of this radiograph, I am wonder about two possibilities: neoplasia (cancer) and fungal disease.  However, I'm afraid that your vet already has more information that me at this point and is in a better position to give their opinion.

to *them* for the veterinary discussion of radiographs I am wonder*ing* about two possibilities. With apologies