Hi Melissa-
We started giving Madelaine a sippy around 6 months and she sort of got it. I went to a straw sippy and she figured it out in a day. Here's a tip for a straw sippy (which I understand are actually better for them as their tongues are used more as they would be for speech development!)
I filled the straw with liquid (ie sucked some up)-put it into her mouth-when she started to suck on it, I let go and seh got the liquid. After a few times, she figured out really quick that sucking gives her water adn we were off! Never looked back. We are now using sippys for 3 year olds as she can use any type now! It's nice bc she can drink wherever we are now and I dont' have to bring a "sippy" cup. kwim?
Milk-make a slow transition. You can start her around a year or so and use it intermittently with formula/breast until she gets the taste for it. Morning start is good as sometimes at first their poops can change as they get used to it. You could also add it into the formula etc but I'd try giving it to her on it's own. It took M about a month or so for the transition and she gets a bottle still at night
LOL.
I wouldn't give her any extra food but if there are long delays between her meals, you might want to give her a bit of a snack of yogurt, fruit, veg etc. Its good for them to have little healthy snacks to keep them going. 11-4 is a bit of a haul between meals for a lo.
HTH
Lauraxx