In managing healthy pigeons, you will not if cleaned weekly, especially scraped once or twice daily, have allergy problems in loft open who'll to partly with wire or holes in wood etc, have bad dust. If they get/are sickly constantly with or from bad feed water and area mostly in, most performance breeds especially, will produce minimal dust from wings, and only as much as unhealthy poo promotes spreading of (paratyphoid from unstable gut bacteria due to nutritional deficiencies etc for instance, as have had happen annually because of songbirds getting into certain coops, or birds allowed to loaf walk around and peck in infected area) bacterial imbalances, parasites, pests n preds, or molting constantly badly because bad feed (corn I found can do, but upon looking under microscope, it's because corn bad). I use small waterers just large enough for day that the pigeons cannot generally bath and poop in, same with feeders. My current tiny budgie pair, create more dust daily, than my performance pigeons (40), bantam OEGs,, or large American gamefoul, and maybe budgies produce as much as all laying hens I have. Any and all hook bills, songbirds, other smaller dove species, quail species, were as bad and or worse than budgies (they are actually a dwarf macaw species), generally caused by worse health conditions hidden that pigeons are less likely to carry any, as many, or for long as things they carry generally not lingered with.. I get more dust blowing n tracked inside than any of my pigeons produce in a day. Moisture humidity air flow are factors to consider as certain lines and breeds are known to show good powdery sheen n use to keep healthy. For mask to work, you need to have something more than mask that just covers mouth n nose, but actual gas mask type like hazmat etc wear, otherwise it's pretty useless except placebo as someone who's been in various fields using them knows unfortunately.
