Hello all. Monday morning my son found our not quite 2 yr old Spangled hamburg on the ground flopping. We instantly thought predator attack, however no outward Injuries & no other hen in our flock of 35+ had any signs of anything. Upon closer look we found she had mites which we immediately Treated. She is now free of mites but second course of treatment Scheduled for Monday. No Other birds had any mites but treated as precaution. She has a pretty bad crossed beak which she did not have Before. She is also unable to stand on her own. Took to vet, he thought anemia Due to mites and syringe feed her for strength. Well today we have bath because she was covered in Feces due to not being able to Move position on own. She can slightly stand if we support her. If we let go she Instantly falls to side and flops. I thought mareks disease but she is generally too old to have it I am afraid we will have to cull her but want to give her a fighting chance But it's been since Monday when we found her. Opinions?