obesity?

[remsin76]

hey,
there was a time when i was worried about my snake being too skinnny. now i think he mihgt be getting too fat. he is about 22 inches long. I'd estimate his age to be about 3 months old. I think he's a nice shape right now. I was feeding 2 mouse crawlers every 5 days. what i want to know is how do you tell if he's too fat? and secondly is it better to feed my snake 2 crawlers every 5 days, or to spread it out to like 1 every 3 or 4 days? thanks