Some wrinkle their nose at the thought, but I supplement with fish or beef once a week. Because I serve them the beef raw, (I get first dibs on the fish, so it's served to them cooked), I'm careful to treat for worms periodically; 13 years and never had wormy poop or evidence of any worms in my flock yet so must be working.
I don't know if the OP has deep litter.
As for your cricket nutrition: http://www.insectsarefood.com/faq.html and https://www.huffpost.com/entry/five-reasons-to-eat-crick_b_13939920 both discuss the topic
