http://www.homebrewtalk.com/f12/raspberry-beer-recipe-questions-114082/

Okay, I racked my beer onto my blackberries, should it be stirred up or is racking on to the fruit sufficient?

It seems as though it did not "mix" the berry puree well,and it stayed on the bottom and did not seem to be suspended for even a short time, I understand the berries would settle to the bottom anyhow, but was wondering if it was necessary to "stir/mix"(without oxidizing)?

this is the link to the thread and the recipe: https://www.homebrewtalk.com/f12/raspberry-beer-recipe-questions-114082/

It's probably cool as is, but it absolutely wouldn't hurt to stir it up if you wanted to. Stirring isn't going to oxidize -- SPLASHING, on the other hand, might. Just stir without splashing and you're good.