For the last week or two this mister Hass been lethargic and out of sorts. He isn't spunky like the other silky roos I have. He usually has to be brought out of the coop. He's standoff ish with the rest of the flock. I rarely if ever notice him eating or drinking. His comb has what seems to be a grayish looking color to it. I've dusted the coop and all of the flock for mites and lice with DE and poultry dust. He did sneeze a couple of times about 2 weeks ago after we had a lot of rain but I haven't heard anything since. Where the other silkies will haul it and run rather than be picked up he hardly moves... Any thoughts or advice?