I have lost 10 chickens since July. We got 6 day-old chicks (NPIP certified breeder said they were vaccinated, but I have doubts) One died the next day, not uncommon. One died from a predator. Then one kept sitting (at about 3 months old) it died. Then two others were "paralyzed" one a foot, and the other just kept sitting. I contacted the breeder ,and she suggested vitamin b therapy. We tried that for two weeks, no change. They seemed ok except for being paralyzed. We culled them. Then the other of this flock (2 months later) got lethargic, pasty poop, and drooling? We culled. Then all the rest since then have been 3 years old or more. They all have had some sort of paralysis, either legs, or wings. The symptoms I first notice is lethargy, keeping to themselves, wasting away, and paralysis. The last one, I had to cull today was 3 1/2 year old Splash Amerauana that started with the paralyzed wing. It started last weekend. TOday she was on her back in the coop, unable to get up. She could only move her head. I now have 4 chicks ( that we hatched from the one that we put down today) 5 hens, and one Roo left. All of my chickens besides the 6 I got and the new 4 were from My Pet Chicken or Meyer Hatchery and were vaccinated for Mareks. Should I cull the rest and let the coop sit for the winter as well as cleaning and disinfecting? Please advise. Kerry (I love my chickens so much! They are my pets, and we have never had any disease! I have a couple now that are almost 6 years old!) This is devastating!!!!