I use the can o worms off and on to vary the diet as much as possible, though i strongly agree to one of the previous posts when they said that the leo's don't respond well to non moving food, I started feeding mine by putting some of the worms in a dish and put a couple live ones at the bottom so when the live ones moved, so did the dead ones. Now, they eat the can o worms with out having any movement at all. Don't get me wrong, i like using the worms, but I personally do not agree to making it their staple source of nutrician which is why I offer live crix and mealies and occassional pinky.