SDCL tit. 25, ch. 4A, app TO CHAPTER 25-4A, Guideline 4, 4.10
It usually makes sense for all the children to share the same schedule of parenting time. Having brothers or sisters along can be an important support for children. Because it is intended that parenting time with the children be a shared experience between siblings and, unless these Guidelines or a court order provides otherwise, all the children shall enjoy parenting time together. Parents shall consider the children's best interests when scheduling parenting time especially for newborns and infants who may have developmental needs that may prevent them from immediately experiencing the same schedule as their older siblings. Additionally, older teenagers' special needs for peer involvement and for some control of their own lives may place them on different schedules from their younger brothers and sisters.
SDCL tit. 25, ch. 4A, app TO CHAPTER 25-4A, Guideline 4, 4.10