Werewolf Gazelle!

At first glance this looks like a shaggy dog story, but Paolo Torchio is a highly respected Italian wildlife photographer and conservationist who has worked in Kenya for 20 years (title link). His photos regularly appear on the covers of wildlife magazines. So this isn't another Photoshop fake. The best suggestion is that the shaggy Thomson's gazelle on the right suffers from "werewolf syndrome" (hypertrichosis) which can also effect humans.