Is that the only reason why you would FF from birth? It might not be like that this time round. Anyway, it's up to you hun and only you can make that decision. I had to FF my last one when he was a few days old as I had no milk and he was getting dehydrated. I have no idea why it never came in though when it did with the others. As for guilt, I don't hold any guilt this time as it was completely out of my hands, so it wasn't a choice I made to go to FF. And as for everyone else's opinion, well that doesn't matter either because it wont matter which one you do there will still be people who say you should be doing the other.