I got my 4 new babies 10 days ago (2 buff orpingtons, 1 cochin, 1 silkie). All except the silkie are well and very active. I thought the inactivity of my silkie was just his/her personality and since it's the smallest of all, figured it wanted to just keep from getting pounced on. Anyway, today while holding him(I have a feeling it's a him), I could hear a "popping/crackling" sound while he breathes. His breathing has always been MUCH more rapid than the others from day 2, again figuring since he's small...needs to breath faster. A few nights ago, he got chilled during the night. Had the heat lamp too far away. I don't know if he came down with a respiratory infection now. If it sounds like a respiratory infection to you, what treatment should I get for him? The faster I know the better, so I can heal him. All are on medicated chick starter crumble, and his appetite is still well. Thanks for your help.