Welcome to the forum dr.
My little Jungle girl, 1.5 yrs, goes between 4-6 weeks.
My three adult Coastals are similar at 4- 7,8 weeks.
It' strange too how some loads are small and some are huge, considering how they consistently eat the same amount of the same thing.
No worries, they go when they go.
Esmarelda, Jungle Carpet
Mack the Knife, Coastal Carpet