We recently lost a foster that was palliative care from the start, but was absolutely so worthwhile.
I can remember one morning, this little one in bed with me, snug and warm...she looked up at me and if she could have said 'I love you' she would have. We had wonderful support from our rescue group and we cried like babies when the time came to let her go. But she died in my arms with so much love, while I told her what a good girl she was and I'm sure that was the memory she took with her.