Hello. I bought 13 RIR hens 2 days ago. I brought them home and this morning I go out top get eggs and they have one nest full of squishy brown poop. 1-2 of them have it on their tail feathers. I have them quarantined from my other chickens and I know they ate eating different food. I have bought from this guy before so I know the chickens ate healthy! Could this be stress from moving?