Thank you all for your kind comments. I am somehow more upset because I know she had a very difficult life for quite some time before she came to me, and I was very much hoping that she would have a chance at a happier and safer life. It must have been so stressful and upsetting to her to be on the streets in Los Angeles for weeks and weeks. Taking her in felt like some little gesture of kindness in a city that can be a bit pitiless.
It's very hard for me that she has passed away so soon, so suddenly, because I could watch her calming down and feeling more secure with each day she was with me. She would follow me around and nibble at my toes and stay inches away from me while I read or gardened. When I built and painted her coop she got so excited that she clucked around the paintbrush and examined the whole process.
She's my first and only chicken, and I've been writing children's books about chickens for several months before she arrived. Her arrival at my door felt magical. It's all very shocking and painful.