my DS did the samething. bang on 10months wouldnt take formula full stop. sippy cup/cup even on his weeties in the morning. so i gave him cows milk and he sculled that (around the 200ml mark X3) and was happy enough with that. i looked at as if DS was b/f and he self weaned so be it. so why cant he self wean from formula? if she's happy eating solids and putting on weight then i guess she's growing up? i just went with the flow for DS - he also has reflux - even with solids.