Just now seing this thread. So sorry to hear about your sweet Shiloh. I don't think we can ever be "prepared" for something like this. Just know that ending her suffering was an act of deep love for her and for her well-being. I had to have my cat of 17 years put down eight days ago, so I am also grieving the loss of my dearest furfriend. I hope you can find some peace and comfort in her memories in the days ahead. (((((hugs)))))