Hi leongfk,

Any update about the bird?

In addition to Silvanus tips, I think you can also observe if the bird have this for long period of time or only in that hour... If long period of time, you may call the vet and ask for help, however, if only in that hour only (only 5 - 6 times) then stop, I think he will be okay. (but if you didn't feel right - do bring him to vet immediately)

Bird is actually sensitive especially to dusk or smoke, sometime it may cause the bird to sneeze. You may also take extra carefull with 'fungi', because sometimes it can kill bird in very shot time.

__________________
Best regards,
Tanin Eh Boon
Malaysia Bird Community