11 month old not wanting formula any more

That sounds pretty typical. Clair-Elise just turned 1, and she is completely off formula now. I gradually switched her to cow's milk over the course of a few weeks (she was throwing her bottle on the floor too). At this stage, they are getting many more calories and nutrients from food than before, so whatever amount you can get him to drink is probably fine. In my DDs' case, she never really liked baby food either -- we just give her mashed-up versions of whatever we're eating, and she's happy. I'm sure it tastes better than formula too, and that probably has something to do with it. Of couse if you are concerned, call your ped. But if he is eating well, he's probably fine.