In two weeks I want to leave my four month old at home and go out for an evening. I cannot take her with me. I've been trying for 9 days to get her to take a bottle of formula, but she keeps refusing. I've tried different types of bottle, tipee, avent, Mam, currently using a nuk latex teat, but can't persuade her to take more than an ounce. I'm introducing the bottle when she is calm and not yet ravenous - she plays with it, puts it in her mouth, but still isn't actually feeding from it. I can't express- even with a hospital grade pump, nothing comes out. What else can I try?