Maybe not completely related to the grey subject, but the other day i had to hold an cockatiel at my work (as a vet assistant), to give her a little injection in her chestmussle. She somehow got her head sqeaked out of my fingers, and bit me in my indexfinger, but i couldn't let the cockatiel go because she was getting her injection. So for 20 seconds i had a cockatiel trying to bit off my finger... wasn't enjoying it, but throw the years i've started to learn to just "accept" the pain intil someone can get that nails, teeth or bird out of my hands.
Kiwi, my grey, wasn't nice to me either today.. we where cuddling for a little while when she decided to want to walk on the railing of the sofa. Instead of just sitting there or walking around, she went on sitting wright behind me, and every 30 seconds biting me in the ear. I thought maybe my hair is anoying her, so i thought the first bit wasn't really meant to bite me. But after a second, and a thirth, and! a fourth time i had enough of it and just put her back in her cage.
I don't know if it was here intention of playing but i sure didn't liked it! She didn't bite really hard but i didn't enjoyed it either.