My cockatiel is about 14 months old now. I've been his favorite in the family for most of the time we've had him and it has been about 10 months now. We bought him when he was just 4 or 5 months old. It is my wife and I and our two boys ages 12 and 9. All of a sudden he is attacking and biting me very hard. I know I'm not supposed to react to the biting but he goes for the ears and fingers and bites very hard and draws blood so it is impossible to not react. I am now hunching over and putting my arms over my ears to keep him from biting me in those places. I don't know what to do about this. I've read that he could be hormonal but I can't continue going on like this for much longer. He is out of the cage from around 7:30 to 8:30 or 9 every night. Do I put him in the cage when he bites and leave him there to punish the bad behavior? Please help!