Hi there, I've been meaning to ask a question about my hissing cockroach for quite some time; she doesn't hiss. I realize that juveniles do not hiss, but I am almost 100% sure that she is fully an adult. I got her from a local reptile zoo and as far as I know, she didn't hiss before I got her, either. I thought maybe it has something to do with her spiracles? When I disturb her it looks like she tries to hiss, but nothing happens. If anyone knows what the cause of this may be, that would be great.