When a newborn's sugar dips, the first question is always: is the baby symptomatic? That single answer steers the treatment.
A baby who is jittery, floppy, fitting, or refusing feeds is symptomatic and needs glucose into the vein straight away - a small $2\,\text{mL/kg}$ bolus of $10\%$ dextrose, then a maintenance infusion.
This particular term baby reads $36\,\text{mg/dL}$ yet looks completely well and is breastfeeding happily. Being $\textit{asymptomatic}$ is exactly what permits the gentler path: keep breastfeeding, then recheck the glucose, escalating to IV dextrose only if the level stays low or symptoms appear.
\[\boxed{\text{Asymptomatic} \Rightarrow \text{breastfeed and recheck rather than IV dextrose}}\]