Ok I have 3 laying hens in quarantine. They started off on the way home just making these odd almost hiccup sounds and doing funny stuff with their head. ( It was hot and they had been without water and had no symptoms whatsoever when I got them) Still eating, still drinking, still active. For a single day they had slightly purple tips to their combs but that faded with being kept in a shady cool spot with water to drink so ... Then we moved onto sneezing. No drainage, still eating, still drinking, still active. Then we moved onto clear drainage still eating, still drinking, still active. Now we have added runny poo which yesterday was still green but today is rust colored and smells up to high heaven. So in the course of less than a week they have moved from nothing at purchase to 3 hours later making odd noises and jerking their head funny to sneezing, clear drainage, and runny rusty colored poo. They are still acting fine otherwise. They even laid eggs every day which was supprised me. They eat and drink a ton. What am I looking at?