If she resettles with her paci, she isn't hungry. If she is hungry, she will wake up and won't resettle for more than a very short time before waking again... you can try a DF but most do start to phase it out once solids are established around 8 months... really depends on her reflux as to which will be better for her in terms of a NF or DF... only way to know is to try a DF for a week and see how she does with it.