well I don't think it could be stress from being moved as I have been doing that since I got him. could it be him just getting a little excited for food? and I don't know if it makes a difference but I feed live.

and yes he has to squeeze into his hides

and on a side note I keep forgetting to ask people this but he squeaks somtimes not like a wheezing because it's not with every breath but like when he is moving around alot he will squeak once or twice, what could it be?