Can a chicken do this once or twice and the revert to normal? I have a hen who just did this this morning, after acting weird last night... she was open mouth breathing and not acting like her usual self.... so this morning when I got her out of the cage in my room, there was a egg yolk color mixed in with a normal pop and then she has a very watery and yellow egg colored poo a short while later. She laid a perfect egg yesterday morning and has been acting normal until last night. Had one hen lay lash eggs and eventually die from whatever caused it a couple months ago. Is it very contagious? Could it be a fluke from stress? Sorry to the OP for piggybacking but our situations are so similar. Thanks everyone