partial zone?

[PL]

Is it possible to have a zone with just a few A-records resolving to
local addresses but forwarding all other queries for records not found
within the local zone to another server?

Example:

MyDNSserver would host the testdomain.com zone with:
host1 IN A 10.0.0.1
host2 IN A 10.0.0.2

RealDNSserver would host the same testdomain.com zone with ALL
records, including the ones defined in MyDNSserver:
host1 IN A 55.55.55.1
host2 IN A 55.55.55.2
host3 IN A 55.55.55.3
host4 IN A 55.55.55.4

Now, a client on my 10.0.0.0 network would query MyDNSserver for host1
and get an answer of 10.0.0.1 but if it queries for host3, it would
get 55.55.55.3 which would come from RealDNSserver which replied to
the forwarded request from MyDNSserver.

Thanks,
Pete.