For about half a year, my Dubia colony has been booming. In the last 4 weeks I left my colony under someone else's care because I was on vacation. I've returned to find my colony in apparent distress. When I cleaned the colony upon returning home, there were DOZENS of dead. Nymphs of all ages, males, and females. For some reason the frass in the corners of the colony hadn't dried and was a thick ~ absolutely revolting ~ muck. I can't explain this, as I haven't seen this happen before, and I've never observed condensation on the colony walls. Humidity is usually around 50%. It has only been a few days since I cleaned the colony, and I checked it tonight. Frass in the corners isn't drying so I cleaned it out. I found a dozen or so more dead - again, nymphs of all ages, males and females. Found several roaches that appeared to be very weak or dieing so I killed and disposed of them. I DO have some sort of beetle infestation that I've been battling for a few months, I think it came in on bad dog food though. Tiny red beetles. They don't seem to attach the roaches so I've tried to conquer them but I don't worry too much. They generally confine themselves to the frass. I inspected the dead and found very few similarities. Several had been eaten on from the end or head - presumably by nymphs, I've seen that before. A few (but not all) had mangled antennae and small quantities of missing appendages - hard to tell if that occurred pre or post death.They were not "crawling" with anything such as mites, worms, etc. The occasional dead had one or two of those annoying little beetles wandering around on it, but this was not consistent and the beetle had no apparent interest in eating the guts of the roach - probably was just passing by on the frass when I picked it up. A random spot check of apparently healthy adults (especially gravid females) didn't reveal any mites or external parasites. I'm finding a lot more dropped ooths than usual, too. So - I can't really figure out what's going on, besides the possibility that the poo muck in the corners poisoned a bunch of roaches. Even so, that is gone, and roaches are still dieing in significant numbers. Can overpopulation alone cause dieoff? I know the colony is a bit overpopulated, though I don't believe it to be significantly overpopulated. But just in case I have supplies on their way to build a new roach incubator this weekend (new stack of egg cartons, insulation, flexwatt, etc.) Could they be literally trampling/crushing or asphyxiating to death due to population level? Thanks for input.