Until September 7th we were averaging about 15 eggs out of our 17 gals. We've got Red Comets, Barred Rocks, Black Star, Welsummer, BO, and a few Red Stars/Buff Comets etc. A fairly hardy egg producing flock. Then September 7th our Silkie passed due to our failure to put her back in the coop and our dog got her. Pretty sure he gave her a heart attack as there were no puncture marks or anything like that. After that the eggs slowly started to dwindle. I thought "PTSD" for the girls and made an effort to spend more time out with them after work and keep Tobs away from their area, even put his shock collar back on to retrain. But the production continued to dwindle to the point that by the week of September 21st we were seeing no eggs. At this point the weather started to change but it wasn't drastic. Still had highs of 65-70's about half of the week and the low's were in the 50's the same as August. The first week of August they were all treated with a dewormer. I don't believe they have coccidiosis as I don't see any of the signs for it (They aren't listless, no one's died, they still have an appetite, no bloody poop or anything abnormal) About two weeks ago, I noticed that all their combs have started changing color from the beautiful bright red they used to be to now a dull red. Monday this week one of our gals is being picked on now on the back of her neck, someone (coughprettysureitwasmybarredrockcough) plucked a good chunk of her feathers out. We are now going on about 40 days without any signs of egg production. The girls have access to Purina Layena Crumbles, Oyster Shells, a Flock Block, and then we give them access to fresh veggies every other day with an occasional treat if we have leftovers from dinner. They have access to 10 gallons of water all day long as well. Since this is our first time raising chickens, I am completely stumped. We have had them since they were day old gals (March 2015) and it's driving me insane that I can't figure it out. Any insight would be very much appreciated.