Well, perhaps not NEEDED per se, but earnestly requested. My mom is a fan of the show, which apparently is in reruns at present. Meanwhile, she is anxiously (some might say unhealthily) awaiting new episodes of this epic saga, to learn the latest thrilling chapter in the lives of little Fluffy and Sniffles and Whop-Whop (or whatever the hell their names are). In an attempt to ease her withdrawl symptoms, I consulted the entry for the show on the Animal Planet website, but there appears to be no useful information about whether a new season will be broadcast. Meerkat mavens please advise!
From the wiki:
Filming for a 13 episode series takes 25 weeks and is limited to the Kalahari summer season, as the meerkats are less active in the winter. Series 3 was filmed from November 2006 through April 2007, and Series 4 began filming in October 2007.
So it looks like they are filming the next season as we speak.