There is more than likely a link between the requirement to sell more ethanol-enriched gasoline (what once upon a time used to be called gasahol) and the price of milk.
Have you noticed that corn isn't making its usual seasonal drop in cost? Or at least not as much?
Corn is being moved into the gasoline world to stretch the supply coming out of refineries.
Problem is, the ability to produce corn, while it can grow, can only grow so fast. Until then, supply and demand is driving things. So corn becomes more expensive.
And corn is part of the feed grain for cows. So, the product of cows--milk--will go up too.
Ahhh, okay now I see the correlation.