Do I dump my parrot when it first fills up?

[BrewVegas]

Do I dump my parrot when it first fills up? I searched around and didn't see it answered, but I'm sure I'm not the first to ask. I'm running my first wash with a parrot. Am I to assume that the parrot functions with as first-in first-out, meaning in a continuous flow, will the foreshots flow out of column of the parrot as they enter from the bottom and exit at the top? I don't want them to mix with the heads.

Thanks...