My adult 60-75 lb Sulcatas all graze for the most part all day long. Sure the take breaks, for fully most of the time they ate eating. Remember, in these wonderful environments we provide them with they are grazers like cows. Young ones should “always" be hungry from growing. Have a vet do a fecal for internal parasites that could be robbing it from nutrition it's not getting which could cause it to “need" to eat more.