Appreciate the info. I've never been too worried about putting a time on when a snake should defecate or shed as long as I know my husbandry conditions are where they should be. Here's the video I was referring to. It's mentioned around the 3:45 mark and to be fair, I don't think she explicit calls out the age of the BOA but since she talks a lot about young boas, I just assumed she was applying this 'guideline' to young boas.
https://www.youtube.com/watch?v=IkkyNjoy1Hc