I don't raise them myself, but some folks use black soldier fly larvae for their birds. I buy mine dried because I don't have time or the proper place to grow my own.
I was just looking for info on black soldier flys. I was super lucky to find tons of black soldier fly larvae under my raised quail cage last summer. I didn't have chickens then but I fed them to my quail and also brought several cups of them to a science teacher that had a lizard. I sure hope they come back this spring so I can feed them to my chickens. Do people freeze them or just feed live?