The younger beardie tend not to eat as much veg,
As they become older you can vary the diet of your beardie up, by adding extra veg,
the only expiernce i having is with my beardie whom is 6 months and eats lots of veg but on her own acord,
she eats all her leafy greens , but me then having to hand feed other veg such as Squash and pepper
Hope i helped in some way!