New kitten, older cat won't eat or drink? Help!!?

I think that she's just jealous. When you already have a cat or a dog and bringing another pet to the family always give the most attention to the pet you have before. Keep them in seperate rooms right after they smell or sniff each other. I guess now your only opption is to have your cat on your lap and have your other pets around and give the most attention to her. Maybe even try to feed her on the same time. When you give your cat attention also lay down her and kiss her face and have your nose touch hers as if your greeting her. I read that in books and cats really seem to understand that. Hope this helps:)