I have one confusing situation. I bought 60 chicks mostly cockerels from a hatchery they are 6 weeks old. Yesterday morning I noticed dirty butt on one of my BO guys he's has white running down from his vent but I noticed his poop is very normal looking and solid. I have him quarantined for now. I've kept butt clean and covered sore area with bag balm. Going to clean today and put Blu kote then va so line to help protect skin. What to do? What is this?