So sorry to hear about Ivy!!!!
I used to own a bird that was previously attacked by a ferret and was supposed to be put down at the vets. (two homes prior to having him) He never was "right" or "normal" for his species, and I don't know how many health problems were caused by that ferret attack! He was a cherry headed conure, and I miss him! I had him from December 2001 to February 2010, so just over 8 years. He died due to failing health (never could fly, left eye was damaged, he got cataracts, possible kidney failure, bad grip, had seizures, bald spot on the back of his head, stomach was bare [some may have been due to mutilation], etc). It was heart breaking to see him not be the way he should have been, and wishing I could have given him the world!
When I was getting into birds and had them, I recall my sister wanting to get a ferret. At the time, I'm glad we lived in California where they are banned! And after doing more research, she decided otherwise!
Again though, so sorry about Ivy! I hope the new girl will help fill the void that Ivy has left, and you can love her just as she is!