I highly doubt you get any head on this beer,not that it matters.Fats/oils whole grains that nature are generally to be avoided with brewing but im still curious what happens.So yeast eat milk sugar?Its probably a matter of time for infection? To much protein for clarity-not that it matters.Thats all i got.Interesting though-keep us posted. My guess it will ferment maybe infect or have a kefirish effect with fermentation as previously noted-and taste terrible-but you never know.