LocavoreT
If your looking for Grass feed organic milk you got to make sure you know where your food sources is coming from.
However it has been shown in many studies that organic and locally sourced food is healthier for you. So I would say organic has more health benefits than conventional milk. It just depends on whether or not you know where your food is truly coming from.
The way I track my foods is by sourcing locally and directly through local farms using the website agrilicious to find out what farmers have in season.