Thanks for the feedback on the set.
These guys are always on the lookout for predators, so they all take their turn looking in different areas. I find it kind of cool to photograph as it displays their personality (curious and cautious).
I took the photos at about 10am as the light was coming over the hill into their enclosure. They were warming up in the morning sun, so I just used the Ol Spot Meter and exposed the scene for their fur, letting the shadows create a nice backdrop.
So the sun was my strobe on this one.