Don't feed the beetles to your beardie, the outer shell is to hard. But you shouldn't be feeding mealworms either their outer shell is also too hard and can cause impaction (a blockage) in your beardies intestines. Good feeders are; crickets, superworms (if your dragon is 17"), roaches, silkworms, and hornworms. You can also feed butter worms and wax worms as a treat.