Bay 12 Games Forum

My outdoor animal pens keep suffering occasional collapses & I've no idea why

There are no trees encompassed by the pens, no mysterious 'floating floors', etc; they're all simply grass/shrub in a tropical biome

Is it possible that my rhino breeding program may be causing these events somehow? I've a couple of adults & maybe half a dozen calves all in the same large (at least 20x20, prolly more) pen with my other 'spare' animals + grazers.. there's nothing else I can think of. Animals keep being 'distressed' by the collapses & injuries (that's the down-pointing yellow arrow, right?), so they're not making full use of the pens' size to feed

BTW all these pens are at surface lvl with at least 2 lvls undisturbed beneath, so it's only surface 'collapses' I'm experiencing

(PS these are standard rhinos not giant ones, if that makes a difference)

IIRC if an artefact (anvil in this case) is created from an inappropriate (non-heat/magma/dragonfire-resistant) material, it's still automatically indestructible due to it's artefact nature

So is there any reason not to place it in a functioning workshop? The Wiki says no, but doesn't go into any detail as to why..