We woke up yesterday to find two dead chickens. We have had a flock of 6 hens and added 2 more in the spring and 2 more this past summer. The youngest 2 were about 6 mo old and they were the 2 found dead. No sigh of intruder, other chickens did not seem distressed. One was found dead on the coop floor and the other was roosting on a ledge above the egg boxes. Looking like they just died in their sleep. We have noticed they've had a hard time joining the flock. The others don't let them eat much, but I always put a bowl of food in the coop so they can eat in peace. We have had cold nights, and it doesn't look like they were sleeping in the main roosting pole with the others. But this particular night wasn't our coldest, maybe 25-35 degrees. The coop stays warm with 10 birds. Anyway I am confused why they died, and worried about it being a disease. I did see a spot on the ground that looked like spit, which I found odd. The others were pecking at it. Guessing mucus of some kind? What should I be looking for to figure out this mystery and what can I do if it's a disease? We had to put our old dog down yesterday as well. I'm not sure I can handle anymore deaths around here. Thanks for any help!