There are some variables & crickets may have a higher chitin to soft tissue ratio than some roaches; however, adult Madagascan Hissing roaches have very hard chitinous exoskeletons which precludes them from being feeder insects in some cases, although many monitor lizards can consume Hissers. One of the least chitinous roaches is the Lobster roach which has a low shell to soft tissue ratio & is fairly easy for most reptiles/amphibians to consume.