Oh the poor thing! 
Just going over a few things.
Have you looked inside her beak for any lesions/canker?
Inside the ears for any debris, infection?
Crop empty in the morning?
Some of her actions, I would say is almost neurological. But if the vet can pluck some feathers and look at the shafts under a microscope for evidence of Depluming Mites (feather mites) that would be a very good idea. IF s/he finds depluming mites, she would need treatment with something like Ivermectin.
I would also get some poultry vitamins into her that has A, E and B vitamins. Probably Poultry Cell would be good.
The bruising is concerning. It could be that she is suffering from a disease like Marek's and the itching is a neurological reaction. I have not seen anything really like this at all.
It would be good to get a few other's opinions/suggestions as well @Eggcessive @dawg53 @casportpony

Just going over a few things.
Have you looked inside her beak for any lesions/canker?
Inside the ears for any debris, infection?
Crop empty in the morning?
Some of her actions, I would say is almost neurological. But if the vet can pluck some feathers and look at the shafts under a microscope for evidence of Depluming Mites (feather mites) that would be a very good idea. IF s/he finds depluming mites, she would need treatment with something like Ivermectin.
I would also get some poultry vitamins into her that has A, E and B vitamins. Probably Poultry Cell would be good.
The bruising is concerning. It could be that she is suffering from a disease like Marek's and the itching is a neurological reaction. I have not seen anything really like this at all.
It would be good to get a few other's opinions/suggestions as well @Eggcessive @dawg53 @casportpony