The first one is the one that is eating, and he is standing on the rim of the lid, I used thread to attach the mesh through the holes last minute instead of glue, so I managed it without chemicals. Was a little rushed but it does the job. What were the warning signs again? The breeder said L2 or L3 in the ad, so wasn't too sure, haven't heard back since I got them.Sometimes mantis leave small bits of a fly. I’m talking about taking a bite then dropping the entire fly. It really doesn’t matter if you spray it or not. You’re over complicating it. Just make sure they get something to drink every few days. If they’ve had a rough trip they might need some accumulating although most of mine will eat straight out of the package.
What was the mantis standing on in the first pic?
Im going to guess they are L2 by the fact that you bought them L2... I really have no idea. You can’t really tell when a mantis will molt through a picture. Just look for the warning signs. But make sure to try and feed them everyday. If they continue to ignore food for 2+ days they should be getting ready to molt.