Aw, first mom din ako dito so totally get the worry! My son went through the same phase around 8-9 months, sobrang aktibo siya pero parang hindi na siya interested sa milk, at medyo nag-panic ako talaga. A few of us mums tried different things like offering milk in a cup instead of bottle, or putting it in other foods like yogurt and cheese, kasi minsan basta iba ang delivery nakikita nila na parang new thing, so mas interesado na ulit sila. That said, since active naman siya at okay ang energy, I'd still mention it to your pedia just to rule out anything, could be developmental phase lang, or maybe she's getting enough from solid foods na, pero better safe than sorry talaga!