Quote Originally Posted by Zincubus View Post
This is a controversial topic .... Whe I started I was told to place card / cardboard down first and feed over the top of the card - just to avoid any swallowing / ingestion of the substrate as it can supposedly lead to impaction .
Fear of substrate impaction is more relevant to lizards however it tended to get brought up for snake care as well in generic 'reptile care sheets' over the years so the idea of it stuck around.
nothing wrong with being overly cautious however.