Some of my hatchlings just started on two pinkies.
Normally i would feed them 1 larger pinkie every 5 days and they'd be cleaned out around 3 days after feeding when some will have pooped, some wont.
With the double pinkies though didn't poop until 6 days after feeding and some just did a slightly larger poop following the next meal.
They're all from the same clutch and have been offered the same diet and care but still all have their own individual schedules and preferences
My sub-adult is very good and with every set up he's had, he's always picked one spot to poop in. He'll poop in that spot about half way in-between meals - at the moment he's fed every 8 days and poops 4 days after eating. But he's a fussy little thing and is very meticulous about how he likes his living conditions!