Is your mantis full grown or is it possible that he/she is getting ready to molt? My girl goes for several days without eating before a molt. I totally worry about her when she does that and I’ve actually been wondering how many days without food is considered normal before a molt. This is only my first mantis so I’m definitely not an expert or as experienced as many of the people on this forum.
Hope your Mantis is ok, let us all know it goes.