It's a practice I adopted 25 years ago with my original collection. For snakes kept in racks/tubs I would just feed in their enclosure since they were always lined with paper. For terrarium kept animals, I have always fed in a papper lined plastic box placed at the entrance of the enclosure. This was to prevent ingesting substrate, and keeping bodily fluids from the prey item contained. Once they have swallowed and begin to crawl, I just guide them back into their cage without much if any handling at all.
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