I am not familiar with what bearded dragons eat, but I know that nightcrawlers are one of the best staple foods for frogs Not sure if that helps you any though. Hornworms are good, but they grow reeealy fast. I think you can put them in the fridge to slow their growth though. Silkworms are excellent feeders as well and don't seem to grow as fast. The only problem with these is they are expensive. They are for me anyway... But none of my frogs have ever turned down a hornworm I hope this helps! I know almost nothing about bearded dragons, so you might want to wait for someone more experienced to answer.