It depends on the CHAM really.. My guy thought "cup or bin feeding" was boring lol. He only recently started eating out of a cup when I hold it close to him(he still only does this for a "treat"). He
LIVES for free range hunting, he thrives on watching and picking out his "victims". I would
HIGHLY RECOMMEND free ranging. It has multiple benefits(muscular exercise, critical thinking and analyzing, best of all it's how they do it in the wild!

....whereas IMHO, I think cup feeding has far less benefits for your CHAM. Try free ranging, as long as they're not black crix they won't bother your guy, just within reason of course, don't unleash a cricket zombie apocalypse on him with like 30 cricks. I have found that if I get up in the morning throw in 10 to 20 cricks he will have them gone by the end of the day 90% of the time. I feed my guy til he's not interested, it's good for their growing bodies and minds
PS.. My guys about yours age at 4 1/2 months