I have a 3 month old pullet who is one of 8 that i kept from a bad batch i bought this fall. Long story short i bought 25 chicks from a bad breeder, they were all sick and started dying so we decided to send a few in for necropsy. They came back with MS, MG, cociddia, roundworm, mites and lice!!! Take into account these were 1 day old to few week old chicks. We culled or let the really sick ones die off and disposed of them. There were 8 that thrived and never had any symptoms but we still treated them for mites, lice worms and coccidia. Now we knew they had been exposed there for would be carriers for life so we decided to get them thier own coop and to close our flock. Which brings us to whats been going on recently, a few weeks ago this baby started stumbling around like a drunk chicken, we seperated her gave her vitamin and antibiotics for a week she got better. Then it got cold, went into the teens for a few days and the 8 got really sick, most just respiratory one with infected eyes and this one stumbles so bad now it cannot walk! So we started everyone on antibiotics and vitamins again, everyone got better but her, shes getting worse everyday, its almost as if shes had a bad stroke or poisioned or something, she stumbles and shakes real bad whenever she tries to move, she cant even get up anymore and she thrashes herself backwards. Heres a video of her tonight, ive tried everything but i dont know whats wrong with her or what to do. I will accept it if theres nothing i can do or if its best to cull, but i really hate to seeing as i have tried so hard on her these last few months, it always seems to be your favorites, And that just sucks! Has anyone seen this before or have any ideas on whats going on and what to do? I dont expect her to live long if we cant figure this out!!!