Dewey Decimating

It looks like time may be running out for my little kitty. She hasn't been looking too good for the last couple of days. Today she wouldn't eat, but she does that sometimes if she doesn't like the flavor of the food I give her. This time I can see in her face that she doesn't feel well. She's going on 21, so she's had a long good life. I'm having a lot of trouble thinking of being without her. She's been with me longer than Roger. We have a vet appointment on Monday, so unless she gets much worse, we'll have to wait and see.