To me, the screaming antelope miniature appears to be sculpted as it if has exposed muscles on its lower half. None of the artwork I saw of the screaming antelope supported this interpretation, but I went with it anyway. The model just seems to have been done that way intentionally, even if the artwork doesn't match. And it could explain why the antelope is screaming so much. I would be screaming too if I was missing most of my skin. Have a look below for some pictures and a description of how I painted my screaming antelope.
Here is the step-by-step process I used to paint the screaming antelope. Unless otherwise noted the paints are all Citadel, though not from their current range.
Calthan Brown - base coat fur
Desert Yellow - wet brush fur
Kommando Khaki - dry brush fur
Ogryn Flesh - wash fur
Mechrite Red - base coat muscles
Squid Pink (Acrylicos Vallejo) - wet brush muscles (twice for coverage)
Breast Cancer Pink (Reaper) - dry brush muscles
Elf Flesh - paint little hands
Baal Red - wash muscles
Dheneb Stone - paint horns, teeth, dry brush hooves
Skull White - highlight teeth, dry brush horns
Badaab Black - wash horns