Thank you for your email. I'm glad that you have a scheduled appointment with Paige, as if the medications did not work, it deserves a second look. One thing that your veterinarian can do is to take an x-ray of her lungs and make sure that there is nothing to worry about there. If she isn't on heartworm prevention, a heartworm test might be a good idea as well. Without knowing the details of her situation, or being able to examine her, I can't comment more on what might be happening with her. I hope that she recovers well!
Give your Foreign Blue an adequate diet in the form of premium, dry cat food. You can spoil your cat from time to time and give him canned food that’s rich in protein. As they get older, dietary requirements may change, so it’s best to consult with a veterinarian for recommendations. When it’s time to change food, remember to add the new food gradually and mix it in the old one in the span of a few weeks or so. Make the transition too fast and your cat may get an upset tummy.
There are various different causes for rapid breathing which may include infections, pain, heart disorders, dehydration among other causes; a cat’s respiration should be below 30 breaths per minute when at rest but if it is significantly above this rate at rest I would suggest visiting your Veterinarian for an examination to determine a cause. Regards Dr Callum Turner DVM