I have a 9month Old English Bantam Hen. About two months ago she started having problems. She began limping and using her wing to help balance on that side. I also noticed some small white dots around the vent area. within a few days she was completely lame with both her legs more forward of her body than normal. then her comb would sometimes turn a bluish purple color and seemed colder and thinner most of the time. and her droppings were a very dark almost black color and in the begining they were green and had some kind of bubbling on top. almost foamy. she was this way for almost a month when i purchased some liquid avain vitamins and added them to her water. Her droppings became more normal and she very slowly began to perk back up. Her droppings have been normal and her comb thickened again and wasn't laying against the side of her head and the bluish purple color was no more. she began walking and laying eggs again. I have not stopped giving her the vitamins in her water but the last two days she has slowly regressed. I noticed this morning the dark green foamy droppings. A few days ago i noticed the limping on one side and now she can't walk and her legs are more forward than normal again. I have looked at symptoms for Fowl Cholera which seems to be the only disease with a blue or purple comb but have also looked at lymphoid leukosis and Spotty liver syndrome. What should i do?