Leopard geckos are insectivores, which means that their main diet should contain insects and it is highly unlikely that they will have any interest in eating fruit.
Earthworms are a great nutritious addition to your leopard gecko’s diet. However, to keep your leopard gecko healthy, offer a varied diet that contains no more than 20 percent of one feeder.
Leopard geckos are good eaters and will eat pretty much any insect you offer them. Nevertheless, giving them the wrong type of food can cause serious health problems.