Ahh, ok, I don't have much to compare him with, other than picture on here... He's a little bit fatter now.
I'm was having a hard time finding rats the right size, but just found a place 30 mins away... (which is why I fed him 2 mice last week)

I do need to get down to wallmart and get a scale, I think that would help.

A thermostat is next on the list, Still doing research on them, but will prob order one later today.

Thanks for your (and the others) input, much appreciated.