I am very sorry and wish the best for your family.
There has been 2 transplant patients in my family. The process is scary and affects all involved. My father had a heart transplant and his brother a kidney.
My uncle's kidneys shut down almost all at once. They think it may have been caused...
I've not done the math but following your thread to learn.
A little about my situation-
I supplement store bought feed with the things I grow. My flock does not get to free range although I have plenty of land, the predators are plentiful. I try to bring a bit of free range to my birds...