Yeah i was talking about the exhibits in general. Im near Osnabrück where they have them in the Unterirdischer Zoo (Underground Zoo) besides lots off differnet small burrowing mammals and bats that you can observe in their burrows and tunnels. Such a cool concept that i tried to recreate i PZ, but we dont have any animals to put there besides the bats and prairie dogsMole Rats surely only work in the normal exhibits. I would find them cool, too. And I am lucky that my Home Zoo at Stuttgart, Germany, do have them since 2 or 3 years.