Superflyer, are you positive that this bird is a male, as if you are 100% sure, this will eliminate the chance this this bird may be egg bound or have other female reproductive issues. There is the chance this bird could have ascities, where fluid is leaking into the abdominal cavity, the pressure from this fluid build up can put pressure on the air sacs, compressing them, and other organs as well, thus compromising breathing and other body functions. Ascities can be caused by some infections, cancer and both liver and heart disease.
If acites is present immediate relief can be brought to the bird by paracentesis, where a needle is inserted into the abdominal cavity to drain this fluid, this will relieve the pressure on the air sacs and other organs and the bird will feel almost immediate relief from this procedure. This would need to be done by a vet of course, with follow up tests to try and figure out what is causing the ascites, there are oral meds that can be given to help slow down any fluid build up, if this is indeed what is occurring.
A bird that has compromised breathing should be considered critical and I recommend that it should be taken to a vet ASAP. If a vet is out of the question the Baytril will cover a good deal of infection issues, but a vet visit at this point may help to save this bird's life.
Good luck with him,
Karyn