Talk to Pediatrician on Pain In Legs

hi.my daughter is 16months . from yesterday she is touching her legs and saying pain pain.nothing happend to her.yes she keeps falling like every kid but from yesterday she is complaining.i wanted to ask you what could be the reason.she takes morinaga bf3 and cow's milk both.someone told me that morinaga makes kid fat and their bones weak.is it true?please tell me.is this could be the reason of her pain?should i stop giving her morinaga?or if you think the reason could be something els. let me tell you that she is healthy not skinny.waiting for your replies.i'd be thankful to you.