how do you cycle through it?

With DS1 I was in the office three days a week mostly and it was easy to cycle through... Now that I'm home almost every day, I nurse almost always while adding one pump session each day to my stash. I think I have more than 400 oz... and only pull out a bag or two for my random office day here and there...

Just wondering if I should start giving DS the older frozen milk and freeze fresh?

We keep it in a deep freezer so I know it has a longer shelf life... but still wondering since I have milk from July!