What is puzzling is that the first time my cat had fluid on the lungs and 2 ounces were drained, my cat could hardly breathe,
any exertion and he was fighting for breath. The vet said that
that was because the fluid was pressing against the lungs so they couldn't inflate and because they couldn't inflate they were rubbing against each other, that's why there was mucus and
phlegm, from the irritation. This time, four ounces were drained and before they were drained my cat had no problem breathing, in fact, upon exertion - he could run or jump to the top of cabinets and have absolutely no problem in breathing. Why is that when, this time, there was more fluid?

The vet said to me, do you want me to put him on antibiotics? My cat has had the Dexamethasone/Duplicillin shot that should last a couple of days. What antibiotic kills the microorganisms that infect the lungs and can cause fluid around the lungs that I mentioned earlier. I read that Doxycycline is used for severe lung infections. Would that be the one to suggest?

Even though the vet reluctantly agreed that it could be asthma, and is sure, based on the present of fluid around the lungs alone that the cause is either FIP or leukemia(when I said, but there's no other symptoms of FIP and leukemia, he replied that the Pred could be keeping them in check. For months?), the problem has always been mucus and phlegm, and lung infections, I think, can produce mucus and phlegm.

Since the start of this, my cat has had no sneezing and no cough, and now, after the last cold, he will give, once or twice a day, a cross between a sneeze and a dry barking kind of cough. No mucus or phlegm as long as he's on Flovent and a low dosage of Prednisolone.

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