Not really. I always serve their food in white seashells. It seems to condition them to know when food is coming, and it helps to keep their food clean. The bark is large enough that they don't swallow it, though. I just like goofing off with the snakes
. I do the fishing line trick sometimes just to make them chase the "moving" prey around their pens. I also like to make their food twitch a little bit as if it's struggling to get away. It's just something fun to do
).
Try it sometime. I just thread the fishing line through the meat with a sewing needle. Then you can either tie a single knot at the end, or you can kink the fishing line to make a "V" shape several inches before the tip. The food sits in the "V." Then you provide a little bit of motion... just enough to get their attention. Too much motion before they've decided to commit can scare them away, though.