Hello may i please ask what to do, i let my cockatiel wonder around in our floor and jusg enjoy but this morning i was having breakfast and accidentally stepped on my bird. He screamed and flew away. I was so heart broken i tried to go next to him but he flies away. Everytime i put my hand near him he'd go away and hiss at me. When i whistle he doesnt respond anymore and i feel so scared sad and guilty. What should I do?