A.C.
I supposed it's always possible that she could be more aggressive drinking soy milk if she happens to be allergic to it and/or has an intolerance to it--the body/mind works in weird and mysterious ways when there's inflammation. The only way you'd know that is if you take her off soy and have her drink a different alternative milk, like coconut, rice, hazelnut, oat, hemp, or almond.