Forgive me, I may be misreading this, so I'm gonna answer what I think I'm interpreting.
Your snakes poo should look like poo. Brown, shaped like a log and smelly. Sometimes you can see fur in it. Should be firm, not runny.
If it comes out looking like a rotten mouse, it means he's not digesting well. Poor digestion could be from temperatures that are too low.
Baby snakes leave smaller poos, not a cause for alarm.