So I finally got around to getting a freezer setup built for a beetle colony with the help of my cousin - and by help of course I mean he did it while I watched . The bugs have been doing great, but I'm having a problem with them eating out the nasal bones of pretty much every small mammal skull I put in there, to varying degrees. The most recent skull was a marten and they had the nasals completely demolished inside. And I have no idea how to troubleshoot this. It's not like I'm letting the skulls sit in there for weeks; I remove them as soon as they're cleaned of flesh. The colony is probably up to around 400 or so and it takes them a day or two to clean something the size of a marten. Does anyone have any tips I could try out to stop this? It's hurting the value of the skulls I plan to clean and resell.