You can try now...but the chameleon might not be quite ready.
You can feed it an assortment of greens (dandelion, kale, collards, endive, escarole, mustard greens, etc.) and veggies (slivers of carrot, sweet potato, squash, zucchini, red pepper, etc.) and a bit of fruit (wedges of apple, pear, melon, etc. and berries).