In my profile pic I'm playing with my parrot, Lily. She's just about 2 years old-a baby in the parrot world.
I got her when she was not quite 5 months old. She was (and is) sweet sweet sweet. However there was a notable pattern to her interactions with me. I started levodopa shortly after she came to me. As always, adjusting the medications was a challenge. I began to notice that Lily would "bite" me when it got close to the time for my next dose. She also would "bite" when I was feeling really tired. As soon as I would lay down she would climb on my chest and and nestle down, if I tried to get up she banged her beak on my collar bone. She continues to do this. When I'm having an off period she gets rather agitated and needy.
Anyway, to shorten this up--I think Lily is sensitive to not only my emotions but somehow senses changes in my bio chemical levels.
To clarify--Lily is capable of breaking my finger, her "bite" I mention is more like a grasp. If she had hands I imagine she'd just touch my arm to get me attention. The thump on my collar bone though--not so pleasant!
Well gotta go--Lily is trying to close the cover to my lap top--stinker!