Seriously though, if YHWH didn't want us to drink it, he wouldn't have made it do delicious. Unless you can find a specific scriptural prohibition against drinking cow milk, I would say you're on the verge of putting words in YHWH's mouth. Judging by the fact that you refer to him as YHWH, I'm sure you're well aware of how wrathful he can be towards people who do that...

Oh also - I was just pulling raptor's chain - I drink a few glasses of cow milk per week, well aware of the potential health risks. As far as I can see, the more hysterial bad milk claims are unsubstantianed by science, but there are some cons to drinking it - no more or less than things like red meat, processed sugar, soft-boiled eggs or my morning bowl of MSG flakes.