This particular incident was I think about 4 days after feeding him. He is about 3-4 months old I'm guessing. I didn't check his weight yet (although I probably should). I feed him a smaller sized hopper once every week. He seems to have a very calm demeanor and eats like a champ so I don't know if it would be stress. Then again I have next to 0 experience. Last time I handled him for 30 minutes. Sometimes it is as little as 15 minutes, sometimes it goes up to an hour. Besides getting a little spooked when I touch his tail and he doesn't see me (which I usually do after he poops so he doesn't smear it all over the place) he doesn't show many, if an signs of stress (that I noticed).