I have a timneh grey for 4 years. I recently noticed that he is always holding a leg up. I know they do this when they sleep are or relaxed. He is doing it all the time. I looked at the foot and there is nothing on it like a sore or cut. He will eat and drink still loves his almond treats. He still talks and gives screams like normal. He will sit on two legs sometimes but almost all of the time one is held up. Is this behavior normal?