My late Parrotlet, Streak da Beak didn't get that nickname for nothing. He was worse than Cheddar at first but did settle down after a while, I was ready to take him back to the breeder as he fly to me just to draw blood. I was on a message board long LONG ago when to topic of which of your birds gave you the worse bite. One on the ladies was a nurse and said her P'let, everyone posted back how can that be, you have a Amazon, Quaker and CAG. She posted back that she'd just got home from a long hard shift and took a shower and was wearing a robe when her P'let climbed down in her robe. She said she was relaxing and Peewee chomped on the first thing that stood out, no bra, she said they likey heard scream back at the hospital, 15 miles away. So it not always how big the bird is, sometimes it what they bite.