I am going to put it to you bluntly GS if you don't treat your rooster and the rest of your chickens for these mites most likely you will lose them all, and since your rooster is showing classic symptoms of mite infestation he'll most likely be the first to go. Like dawg 53 said they cause anemia and that will kill them.. He's an awful pretty roo do you really want to lose him? you can find sevin dust at just about any feed store or Lowes or Home depot.. but time is important. and why give him left over Baytril? it's the mites that are making him sick..