I had/have the same problem with my daughter who is now 9 months old. My advice to you is have a little bit of patience. As she gets older in the coming weeks/months she will start eating solids and her need for breast milk as often decreases. She may still cry when you go out and seek your breast milk for comfort, but at least you can be certain that her nutritional needs are being met for the couple of hours that you are away from her. Whilst you go out, you mother in law will be able to feed her solid foods if she is hungry. At 5 months she is still a little bit young for solids, but as she gets a little older she will be quite happy to accept them even from someone other than mom. In my case, my daughter never took a bottle and going out is still a big challenge, but that has a lot more to do with separation anxiety than with hunger. I too had a couple of days that my mother would call me to come home because the baby wouldn't stop crying. In reality she wasn't crying because she was hungry but because she wanted to be with me. As sweet as this is it is also very suffocating at times, and you just need to have a talk with your caretaker about realistic expectations. Your daughter may very well not enjoy staying with your mother in law, and getting her to take a bottle isn't likely to change that. The only thing that will help is constant exposure to the situation. The more often you go out and leave her with your mother in law the easier it will get. With my mother, I leave my daughter with her for about an hour every week or so, not so much because I need to go out, but more so that my daughter is exposed to the experience of grandma watching her. By doing this frequently, and for short periods of time she is learning that when mom leaves me with grandma it is okay because mom will be back soon. The more comfortable she gets with this situation the longer I can leave her with my mom. I certainly can't stay out all night or anything like that, but it is enough time for me to go out for dinner with my husband. Another piece of advice I have to offer is that "training" your daughter to stay with your mother in law is just as much about getting your daughter comfortable with the situation as it is about getting your mother in law comfortable with the situation. This was particularly true of my mother who never breastfed and found it very frustrating that I couldn't just leave a bottle that the baby would take with content. My mom is starting to get use to taking care of my daughter without the assistance of a bottle and I am sure your mother in law will to. Like I said as she gets a bit older and starts eating solid foods, your mother in law will find it easier to comfort any hunger cries.I don't know whether you have considered this or not, but my daughter skipped the bottle and has started using a sippy cup. She never really took to the expressed breast milk or formula (but then again she won't drink juice either), but she does drink water in it and really does enjoy it and finds comfort in it. She started drinking from a soft tip sippy cup at 6 months of age. Maybe if you are more persistent than I was, you could get your daughter to drink milk from one...it is certainly worth a try if you have had no success with bottles. Playtex has a great stage 1 sippy cup that has a soft tip on it. http://www.playtexproductsinc.com/in...yStage.aspGood luck