I missee this thread before, but Izzy had had a few rough days too with much more coughing, ending almost in a whistle. Every time this happens , I panic (especially about a month ago, when he was breathing very heavily and I took him to the vets, expecting the worst). Frusicare, as he has started retaining fluid sorted him on that occasion, so he's now on Fortekor, Vetmedin and Fortekor. I find that he coughs more around weather changes, be they hot or wet and think it's something to do with air pressure. his last really bad do was when the hot weather had actually eased, but the air was very oppressive.
Seems like there are lots of us on the knife edge.
Barbara, Monty, Joly and Teddy.