If you plan on building in a cave, build at least 2 layers worth of walls of the material of your choice (the stronger the better). I built in a cave once, I logged in it was fine, I took my raptor out for some meat for my feeding troughs and when I got back, I saw one of these dudes eating my wall. My tames killed it but I had to fix that gap. So if you are planning on building in a cave. Have more than one wall dividing you and the killer centipedes. Or do the the therizinosuarus tips and do the bounce spike wall I mentioned. Never failed me.

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