I tame hacked a gos this year and am amazed with the tameness...no screaming except prior to the hunt. It really is only vocalization..not screaming. I had screaming with my recipe bird 5 years ago. It seems to me that with the recipe (or maybe even a "half" tame hack) the bird always wants to get away, and is conflicted about that need and the need to feed. Aggression may be the result of that conflict...(I;m no expert). With the complete tame hack, the bird is never restrained (except at night free lofted in the mew), and always seemed to want to be with me rather than free. No conflict. I fed from the lure twice daily with many flights each time. He never bates or screams. He seems quite a bit happier being with me in the house than by himself in the mew I think. Not exactly on topic except that he is sooooo tame with a high weight window.