i dont have a problem with these crickets because I tong feed.
I also breed them too. currently the crazy reds are illegal in every U.S. state except California because of a virus they carry that will wipe out regular house crickets.
the Gryllus assimilis are the types you want to look for. black in color when they reach sexual maturity. I would ask your local pet store what company they purchase their crickets from
These types are prolific breeders and large in size. I love them for my pacman, pyxie, and bearded dragon, but they are very dangerous if left unsupervised in an enclosure.