Ok, I noticed a cough, sneeze, an eye bubble on one hen. Then my Roster could not crow an was congested, plus his cone had turned gray. . . .I started Duramycin-10 in their water for 4 days. No change. Then I switched to Tylan 50 orally for 5 days, my Roster started crowing again and a little color came back. . . . but my hen is the same???? What do I do now??? HELP PLEASE, mind you I have wormed, and treated for lice an mites thru out all of this.