On harvest moon anwl when you gave the blue feather to rock he says that makes you wont to fly like a bird you and you got all four hearts how can you give the feather to him without him saying that?

Well, if he keeps on saying that. Then, first! You have to find all of the scene's to Rock, then heart scene's, enter the right thing that sounds nice and romantic enough. And on the fourth heart scene, you will be talking to his parents, then after all that. You will have to go up to Rock and give him the blue feather, but if he keeps saying that then you must've done something different, if any of the other guys have four hearts for you, he won't accept. But if it does work, he will say "Aha!!" That mean's yes. Hope this helped!