This looks like to be quite a decent size for a meerkat exhibit. I believe they are mixed with radiated tortoises (I am not 100% sure if it still is, but I saw it on a YouTube video).
I believe that the radiated tortoises are still in with the meerkats, and having visited this exhibit in 2007 I can honestly say that it is one of the largest and best meerkat exhibits that I've ever seen.
