Keep your eyes, or in this case, your ears on him. If the rattling doesn't go away in a day or so, or gets worse, please think about Duramycin-10. I know that the Baytril is 'big guns' but it may not be the best thing for what ails him. I'm not even sure you could give another course of the Baytril can you? I've never used the stuff so have no clue. If he's not getting rid of the chest noises, I'd say you're not out of the woods yet. Sorry to bring it up, but it would be a shame to lose him now after everything you done so far!
Now that I've got that out of the way, lol, I am so very glad to hear he's doing better! That is really great news and thanks so much for keeping this updated. It's nice to be able to hear the end of the story and be able to put it to rest. I find myself so many times during the day wondering what is going on with this one, or that one, lol. Maybe silly, but I know how I feel about my own. So keep it up please, I'm waiting for my happy ending!
That's what I used for my rooster who was hoarse and seemingly congested/wheezing. Penicillin shots (5 days) and Duramycin in the water (1 week). Fed him some raw organic hamburger, plain yogurt, apple cider vinegar and he recovered nicely.