I do a lot of skull cleaning and I generally take the brains out with a small wire, tweezers and some water. It can be kind of time consuming when I'm cleaning a large number at once. I'm just reading on here now that you can leave the brain in and its good for the colony, can anyone explain this to me? I have a colony of a few thousand. They go through raccoons, bobcats, coyotes in 3-4 days. I'm not cleaning any deer sized skulls (yet) If anyone can shed some light on this or let me know of a quicker way to get them out. Thank you.