One of my adult male ambilobes refused to eat crickets for nearly three months this winter and ate nothing but roaches, silkies, mantis, grasshoppers, and hornworms. Now he is stuck on crickets again and ignoring all the other feeders I offer. I just can't wait for the cicadas to start emerging from the ground here. I got out at night and pick them off the trees when they are crawling up and place them in a tank with sticks and bark in it so they can emerge. My chameleons go nuts for them all, especially when they are still pale green and very soft. Try many many different feeders, eventually he will eat crickets again, or he won't it all depends on the cham.