Never mind.. you can go back through on a new game+ .. the good news is that it puts them all back.. so if you missed 1 feather then they all get replaced.. so just grab the first 5 and the trophy will ding
for those who are working on this platinum. i just currently just used this guide to beat the challenge of the gods #3 nanocrates, but for the 1st 20 mins i couldn't do it. so if you find yourself struggling like i was even with the guide my tip is to make sure that you have your arms of sparta fully maxed (LV.4). also if you follow the guide and you didn't start a new gameand you don't have all of your power/weapons fully upgraded doing the challenges is the best way to stack all those trophies in one playthrough.
also a tip for "Treasure Hunter" if you dont get on your first play thru. a quick tip is to equip "Callisto's Armlet" to auto win mini-games and play the sex mini-game 3 times just press O and sit back. after the third time you will recieve "Aphrodite's Ambrosia". Another tip is use "The King's Ring" to collect 10x red orbs for Temple of Zeus cause really it takes a Godly amount of orbs no pun intended.
When I was completing the Challenge of the Gods, I found in Athena's Challenges #5: Fear Kratos, you do not even have to kill one person when it loads just stand there and do not move they will cower no matter what. This makes the easiest challenge even easier.