My cat's X-ray shows enlarged lung arteries. Could stress be why?

This is indeed very rare - most often pneumopericardium is related to infection, cancer or trauma. I don't think the elevation or stress would cause pneumopericardium. Unfortunately there is no way to know why this happened - you might want to ask the vet about a necropsy (autopsy) if this happened recently. This might bring some closure.

Panting in cats can be caused by stress, so it's likely that the panting was due to Luna being anxious about the car ride. In some cases, panting can also be caused by heart disease or other respiratory problems - this is much less likely if Luna is acting normal otherwise and does not pant in any other circumstances, but you could certainly discuss your concerns with your vet to see if he/she would recommend chest x-rays or any other testing to rule out a serious problem.

I recommend to check with the rescue organization if Milo has been checked by the veterinarian. Generally a physical exam and radiographs can give you an idea of lung health. I don't think stress will change his sounds. Things to look for include a worsening of the sounds, open mouth breathing, increased respiratory rate, change in respiratory character, shortness of breath or discharge from the eyes or nose. I hope this helps.

You could ask them if they work with a cardiologist. If she hasn’t yet had an echocardiogram (performed by a cardiologist) that will probably give you the best information. Don’t hestitate to respectfully and politely ask the vet in charge of her case for clarification if you don’t understand what’s going on with her. Sometimes we forget to discuss things in an understandable manner! I am sure your vet would be happy to clarify as best as possible. I’m sorry I don’t have more specific answers, but with complicated cases like hers I really can’t give you a whole lot without knowing the entire story. (Which can’t be done in 500 characters.

I can definitely understand your concerns about Lio! Hyperinflation of the lungs means that one (or more) lung lobes are over-filled with air. This can happen for several reasons that cause some air trapping. Some of these include asthma, bronchitis, trapped mucus from allergies, abscesses, granulomas, or even cancer. When the underlying cause of the overinflation is treated, the overinflation typically resolves, but some of the conditions I'd mentioned do require long-term or even life-long treatment. Lio's vet will be able to guide you as to whether further diagnostic tests and/or medication are needed at this point. I hope that everything goes well for him!

Oh no. Poor kitty. Blood pressure can be affected by either of these conditions, but is impossible to say for sure without getting her blood pressure checked. This is a tough one, because there are so many possible causes for her weakness and slow breathing, but I would have to assume that her underlying heart condition may be the culprit here. Saddle thrombus is also a big concern with cats that have underling heart disease, and can lead to sudden paralysis of the hindlegs, with vocalization (moaning). I know you don't trust the other vets in the area, but it may be worthwhile at least taking her in to see if her blood pressure is indeed the problem. Getting some bloodwork analysis on her may also be indicated, depending on her physical exam findings. We have to keep mind too, that unfortunately CHF patients can only be helped with medication for oh so long, because it does not cure the underlying problem. I hope that Brancinia is going to be ok, but its best to take her in immediately. Waiting for your preferred vet in this situation may be more detrimental to her overall wellbeing than taking her in to determine her current status. I wish you all the best with your furry friend. Take care.

I am so terribly sorry for your loss of Moo. It is very unlikely that the accident was at all related to her heart disease which eventually lead to heart failure and her passing. The enlarged heart the doctor diagnosed her with indicated a chronic long term condition that would almost certainly would have exsisted before the accident. Again my deepest condolences on your loss. Please feel free to ask any further questions you may have. We are here to support you