She went downhill very suddenly during the night after rallying on Sunday. I took her to the vets first thing this morning and he said it was time. She was 19 years old.
It was very very peaceful and I told her I loved her again, I knew she wanted to go. She didn't suffer at all. The vet let me stay with her for 10 minutes and she looked just like she was sleeping. I'll get her ashes and a paw print back on Saturday. My heart is broken and the house feels so empty now. But I know I did the right thing for her.