BIND and recursion

We have a delegated zone on the BIND DNS which points to our GTM. We have an A record for the GTM, NS record for our zone, wip.oursite.com, and CNAME for hosts that are delegated such as store.oursite.com. Only about half oursite.com is delegated to the GTM, the rest are other resources that are not load balanced at all so we dont want to move the entire zone to the GTM.

How do we implement recursion for just the delegated zone? We do not want to have the entire oursite.com recursive nor do we want the BIND server to implement recursion. Do we need to turn on recursion in the zone file of the GTM? What do we need to do to BIND to implement zone level recursion?

Is there a non-recursive way to delegate a zone to the GTM?

thanks,

Eric