When it comes to the older one it is not unusual for an adult to go off feed and refuse to feed when they change environment it will be a matter of optimum husbandry (see caresheet) and more importantly patience, it could last weeks, it could last months.
For the younger one do this to a T https://ball-pythons.net/forums/show...-hatchling-101, it's a proven method and considering the size it's the best you can do considering the day time activity and food refusal. At his size it should be voraciously eating and be hiding all day not be in the foliage those are two signs that the husbandry is off.
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