The 2-week shutdown is a calming period after adoption where a new dog is given time to decompress and safely adjust to its new environment without overwhelming stimuli.
Your new dog should sleep in a safe, comfortable space prepared in your home, ideally in a quiet area with a bed and some toys to help them feel secure.
The 3-3-3 rule outlines the common adjustment stages a new dog experiences: 3 days to decompress, 3 weeks to learn routines, and 3 months to feel at home.