Timbersmom

I'll have to go read up on molting. I'm not sure what it looks like! I will check it out though.

I'm joining. I actually have a question. I am a new bird owner and have a Timneh African Grey named Timber. I am his third owner (that I know of) and his age (according to the first owner) is 4-5 years. I've had him a couple of weeks and we have made a lot of progress, but we still have biting issues. I've been going really slowly with him so he has time to adjust to us and his new environment. Here's my question (finally). He will now let me scratch the top of this head (when he is in the mood). Last night, I was gently scratching his head. Out of nowhere, he turned his head and bit me (not horrible but drew blood), then he immediately dropped his head for me to continue scratching. What does this mean and what should I do? Thanks!