@DavidBrown There are actually two large, sloping paddocks that look similar and for many years there was always one enclosure for Musk Ox and then a second one for Caribou/Reindeer adjacent to each other. On my last visit to Point Defiance Zoo (early 2018) there was a small herd of Musk Ox but the Reindeer exhibit was devoid of animals. I see from the zoo map that it appears as if BOTH exhibits are now taken up by Muskoxen:
