I just rescued 8 adult hissers and several dozen crickets from a Petco dumpster. Last month, I found 3 more live adult hissing roaches, along with over a dozen babies. Petco throws them out if they multiple or run out of food. I find mealworms and crickets regularly. Dubias sometimes too. Petsmart once threw out a ton of live fish. I was too late for most if them, but some survived and are still alive today.