If she is happy and content and sleeping well then Im sure she is getting enough milk, she would let you know otherwise. but I can see why you want bigger bottles less often. my 6mnth old only takes 3 bottles but they are 8oz. What kind of bottles are you using? Bradley will only drink out of the flat teats, otherwise he only take a couple of ounces then moans at me. a sippy cup could work also, but at 5 mnths she might take a while to get the hang of what to do with it. The cutting out solids thing doesnt work, i tried it, when my health visitor said he sould be taking at least 4 bottles, i dont force him to take it now, its not worth it, each baby is different.After giving her a few ounces give her a rest then try again, it may take longer to get a bottle down her but hopefully she will cut down the time in between....good luck!