If you buy directly from the farmer, then who's gonna say anything?
Otherwise, ordering from bigger places you can do two different things:
But it as "pet food" and then drink your pet food (perfectly legal).
You can buy a share in the farm so you own part of the cow. You're buying the cow, not the milk, and you can drink the milk of your own cows.
It's a local farm and no the grass is not treated. Why would they treat the grass?? It costs money to do that.
Right Side Up,
When you buy from a local farm that has a clean set up, there is virtually zero risk of illness. The stuff is WAY cleaner than anything you'd buy at the store, not to mention the store-bought stuff likely has crap cooked into it (since the milk doesn't have to be as clean since they pasturize it).
Raw milk is far healthier than store bought crap.
But you should know that the farmer runs a clean ship. If not, don't drink it raw.