The majority of the prey that savannah monitor consume in the wild is invertebrates. Some owners opt to feed their pet rodents, which is not necessarily a bad thing, but these lizards do not generally encounter rodents in the wild, as rodents are nocturnal and savannah monitors are diurnal. A diet of various invertebrates is the most natural and healthiest option for your pet.
Crickets are a popular choice when it comes to feeder insects, because they are inexpensive and very easy to come by, either at pet stores or online. Mealworms are also commonly fed to savannah monitors, with the king mealworm or superworm being the best choice for these lizards. Silkworms, tomato hornworms, locusts, roaches, millipedes, beetles, and stick insects are also good options, but they may be more difficult to locate.
One of the best ways to help your savannah monitor to get all of the nutrients he requires is to gut-load. Gut-loading is the process of giving your feeder insects nutritious foods before feeding them to your pet. When he eats the gut-loaded insects, he will receive the nutritional benefits of the foods they were fed. Crickets, mealworms, and roaches are easy to gut-load.
Savannah monitors will also enjoy some shellfish in their diet. Shrimp, snails, and crayfish are often fed to these lizards. Shellfish can be purchased at your local fish market, bait shop, and supermarket. Some pet stores also carry crayfish.
If possible, feed your monitor about three times a week, at the same time on the same days, establishing a routine that your pet can be comfortable with. It is better to feed earlier in the day so the food can digest while the cage is warm. He should be fed only as much food as he can consume in about 15 minutes to avoid obesity, a common problem among captive savannah monitors.