Carole, I'm terribly sorry to hear Lexie is so unwell. I hope she will start eating again after you stop with the antibiotics, but if she doesn't eat at all, I would probably give her something she likes, unless there is a good chance she will get better. I know it's hard to see her suffer, and also starving. Does she drink? If not, perhaps you can gently squirt some water in her mouth through a syringe.

Sending lots of positive thoughts and love to you and your precious Lexie.

(((hugs)))