The weirdest thing so far I had to do was make a f/t rat crawler and a f/t small rat seem like a live food item running around my Dumeril's boa's enclosure. When I feed her, I take out her plant and take her out and put her onto the substrate and she knows she's being fed if I do that so then if she only stares at the food all I do is make it seem alive and then she'll go for it (make it look like it's walking around and doing that "face sniff" the rodents do to snakes sometimes).