Milk is gross. I picked the 100% cow approved because it seems to imply that cows weren't mistreated... perhaps because the milk is soy, almond, rice, etc. The slogan is also sort of reminiscent of "Kid tested, mom approved" from Kix. Kix are great.
If I had to chose, "Fresh from our Family Farm" would grab my eye the most; however, I also tend to have a cynical look on things, and so don't really care about how the cows are treated. I spent some time growing up in the midwest and know what it is like to work on a dairy farm. Milk is milk. When I do my shopping, I don't care how pretty the carton is. I care what the price is. That's it. Nothing else matters.