Nothing good is going to come from this, what amounts to grocery store monopoly.
https://en.wikipedia.org/wiki/Performance_Food_Group
https://en.wikipedia.org/wiki/Core-Mark
These are the people all the farms sell to.
I rarely shop at Walmart, for a number of reasons, but on a couple occasions I've picked up some milk at Walmart, because I needed some and wasn't near my other grocery stores. Never again though. The last time was ridiculous: Walmart marked up every brand of milk to absurd prices much higher than other grocery stores, except for their "store brand" milk, which wasn't cheap either. I didn't even bother getting a full gallon, just the smallest I could find and got the hell out. I couldn't imagine shopping there every week.