Why are my Buff Orpingtons doing this help!

[BuffOrps123]

My Buff Orpingtons (I have two) are wheezing when they breathe, and when they sneeze about every half hour, it stops, then starts again 5 mins later. They have been like this for a month, they are eating and drinking fine, and none of the other girls have it? Really not sure, please help!

 

[Eggcessive]

You might look at this link and see if infectious bronchitis or maycoplasma G fit what you are seeing: http://edis.ifas.ufl.edu/ps044