as far as i know temps and humidity should still be good (as of the last thread i made concerning my enclosure). i don't think the rats i have been trying to feed are to big just because they are the same size he was being feed at the pet store. if i had to guess, i think the stress from moving, having an inadequate tank for a little while, and winter turned him off feed. i still need to get a scale, so i'm not sure if he has lost any weight yet. my train of thought was having either a couple large mice or a small rat presented live might be enough to get him eating again, and then hopefully get him back on the f/t medium rats.