I actually found a slug not too long ago

I was like weeee I'm gonna get to feed a snake a slug!

So then I put the slug in the tank right infront of Sunny, my yearling red sided. She looks at it, tongue is flicking, moves like a couple millimeters closer, tongue flicking even more, and then the staredown happens only for the snake to turn away and put her dead down to rest more, thats when my face went from to

In the morning the slug was still alive chilling out at the waterdish. After work.. no sign of the slug.. maybe one of the other 2 ate it