I've recently gone to live feeder crickets for my invertebrates, and they keep dying on me and a friend of mine. Mine don't die as much because I have half in one container and half in another. I don't know if that contributes to lower death rates or whatnot, but I'm just putting it out there. I put a couple of bits of dog food and fruit in there. There is a little bit of substrate in there for them to do their thing. The humidity is very good and they seem to get all over the food when they get in there. But over time they just randomly die and some crickets even eat them. What's going wrong?