Yes i figured you were being sarcastic but I was not a fan of the tone since to be it sounded like kicking someone when they are already down. The dog food comment is ironic since go to any dog forum and a number of people would want to burn you at the stake for feeding something as subpar as kibble. ^.~
The fact these are flower mantises however doesn't change my feelings about them still being plenty able bodied to handle spiders. Ambush spiders would frequent the same areas looking for those same flying insects. Spiders are indeed predators, but then again so can crickets easily fall in tha category too. I sometimes wonder if people realize just how much mandible power crickets have. Nothing like feeling and hearing the sound of a cricket biting on a metal tong to realize just what they can do. Mantises however are well equipped to handle them along with the other biting, stinging, pissed off prey items they snag.
I am in agreement though, I don't like to feed spiders just like you will probably never see me with a communal set up and then there is the fact I rarely ever risking breeding. I am cleary one of the types on the board to get way too attached to my babies.
@ Hetarem- I hope she pulls through. Sounds like it is way to early in my opinion to call it quits on her. I would give her a couple of days at the very least before making the decision.