I'm new to raising chickens so I'm at a loss as to what I need to do. I came home from work to find my sex link laying next to the water dish. She didn't move when I went in which was definitely odd. As I lifted the door to my coop to gather eggs I saw my older rhode Island red getting off the nesting box with a excessively large smear of foam looking feces. I opened up the door like I normally do in the afternoon to let them free range. I didn't notice any odd behavior from the RIR just the mess on her behind. The black sex link moved around the yard but always ended up laying down where ever she was. I never could catch her moving but kept seeing her in different places laying down. Unfortunately I had parent teacher conferences that I had to be at so I had to go. When I came home 4 hours later I found my healthy girls roosting like normal but the RIR is laying under the nesting boxes and the sex link is laying down on the ground underneath the coop. Any ideas of what could be causing this and what I need to do? I definitely don't want to loose my girls and I don't want it spreading to my other girls. Added info to help: These girls were supposed to be 1 year old (so said the man I bought them from) but they have never been good layers. The sexlink lays a ginormous egg once a month or so and the RIR has been laying fairy eggs the past 2 days but before that wasn't laying eggs more than 1 time every month or so. I feed them a mix of pellets and layer feed.