I am so sorry to hear of your loss. Cherish those times that you shared and she shall remain in your heart.
It is likely that her death was caused by a number of things, the feather cyst and medications meant she was already fighting illness, the loss of blood would have exhausted her further which may have lead to a heart attack or the paralysis. Most importantly you did all you could for her.
Fly high little one.
Cress ... Dandelion ... Tyde
a selection from the milipidi flock