As a temporary fix, I’ve used sliced banana pieces and put multivitamin on them, and hand feed by touching it to his lip when he opens his mouth to ‘hiss’
My veiled chameleon (Giovanni) has not been eating crickets for roughly the last month. He is somewhere around 6 -10 months old. I’ve been hand feeding him apple pieces and banana slices dipped in multivitamin powder and calcium powder. This started when we couldn’t get crickets for a few weeks...