You might get a stuffed animal to put by her. I’ve read they like that. Something she could snuggle with or lay her head on. Just for a little “company” while she’s all alone.
I am so sorry to hear that your sweet Cha Cha isn’t doing well. I can tell how much you love her and she has been very lucky to have been in your care. I wish I had some advice for you, but unfortunately I don’t. I’m sure someone more knowledgeable will be along to help you.