I am new to all of this and despite losing 1 bird to a predator early on we have had a great healthy flock of 7. In the past week 2 birds have been slower moving and open mouthed breathing. Prior to buying treatment for suspected worms they disappeared. Thinking they were taken by something that left no evidence. This morning I went out to the coop before work and noticed my favorite hen Clementine weak in the corner staring at the wall. I picked her up and tried to see if she could stand. She was so weak and pale. I gave her water and am having my father inlaw look in on her until I get home. She seemed perfectly fine last night when she went into the coop. We did notice that during the night something came into our fence and our lab kept barking and chasing things out. Wondering if she could be in shock from the other losses. It has been so wet and cold out that I'm sure they can catch anything out in our muddy swamp yard. Help! My broody hens just hatched babies yesterday! Should I quarantine all of them all?