Hi, i had got a couple of cockatiels from a pet store, both of them totally wild and terrified at the sight of humans, its been 20 days now, one of them, Myrcella has become extremely tame loves cuddles steps up on my finger and hangs out with me while the other, hulk is still terrified and will eat from my hand but no luck on stepping up or anything else. i have been training them both by making them step onto a perch first and then onto my finger. also when i take them out of the cage hulk still flies into walls and is scared of people. am i doing something wrong? should i try some other method of taming? if so please help.