My 1 1/2 year old Black Star started having a creamy whitish discharge from her vent a couple of days ago, it's 10 degrees outside so the discharge freezes as it comes out. I used warm compresses to remove it yesterday, but it's still coming out. She's not hanging out with the rest of the flock like she used to. Seems different as she's usually very vocal and friendly. Drinking water, but not laying and not eating like she used to. Help, please?