After hours of research, I have come to the realization that my chickens have fowl pox. Every single one of them exhibits small, black dots on their comb and waddles (some more serious than others but never as intense as what you find on google) even the bantams, which are separate from the large fowl flock. I'm observing a drop in egg production, some sluggishness, as well as one of the wyandottes (who also hurt her leg, which is healing very slowly) appears to be ill with a dirty bottom and digesting very slowly. I got the large fowl flock on Oxytetracycline, suggested by The Chicken Health Handbook, as well as the bantams are on nutri-drench to keep their immune systems up. Anything else I could be doing? Thanks!