generally speaking, the warmer you keep them (95*) the faster they will grow and multiply. the food that usually comes with them is primarily intended for optimum growth and getting the colony established, but it is a high protien food (primarily crushed dry dog food) and is not good for chameleons (has been known to cause gout or worse in chameleons) so if you intend on feeding any of your roaches to your chams right away, then it would be better to feed the roaches regular cham feeder gutload, fresh grains, and veggies, melon rinds, and stuff instead. even under optimum conditions it will take several (3-6) months for dubia to reach full grown breeding size. adults will begin producing babies right away. many chams cannot handle full grown dubia