You are the assertive pack leader. When establishing a new schedule or change in protocol: ,
Do it at a non-relevant time. Not in the immediate moment.
Speak directly and resist over explaining.
With little kids, solidify the new rule with an activity like a schedule for the wall and/or photos of your child brushing teeth, closing eyes, etc.
*A physical reminder like a chart, schedule and arty representation of the new system, helps with follow through.