I've heard from many sources that veiled chams will eat greens like spinach or collard greens. Is that true from your experience and if yes is it necessary cause i already gutload all my insects with fresh veg.
That is correct! And older veiled will need more vegetable nutrition in their digestive system and appreciated to have his vegetables rather than the live feeders. Their appetite will definitely slow down compare with a younger veiled .I wouldn't use spinach because it can bind calcium in chameleons