@Cat-Man Interestingly enough, the African Wild Dogs have been gone since at least 2012, with Warthogs in the enclosure for the past 8 years.
@Cat-Man I think there was the feeling that the exhibit wasn't quite large enough for the 4 African Wild Dogs that were originally there, plus most of the viewing is looking down on the animals. Warthogs have been a better fit and they've definitely churned up the ground!