Cave hyenas don't really make a scratch, like a lot of times for anything about the Pleistocene epoch or anything remotely about ice age, it'd always default to mammoths or sabre-toothed cats (Smilodon) unless you narrow your search or maybe that's me. But then again, cave hyenas are merely a subspecies of the spotted hyena that still live today so its easy to use a spotted hyena as a reference point to an extent. I'm also gonna leave the cave's interior up to whatever you want it to be.