Max hosts in an RR

[Elie Mazzawi]

Hi,

we have 30 servers in a dns RR. and were planning to ad more. is there
a way to set it up so that when clients do dns lookups they only get 3
or so. like google's

# dig google.ca
;; QUESTION SECTION:
;google.ca.                     IN      A
 
;; ANSWER SECTION:
google.ca.              1800    IN      A       216.239.57.104
google.ca.              1800    IN      A       216.239.59.104
google.ca.              1800    IN      A       216.239.39.104
 
;; AUTHORITY SECTION:
google.ca.              345600  IN      NS      ns2.google.com.
google.ca.              345600  IN      NS      ns3.google.com.
google.ca.              345600  IN      NS      ns4.google.com.
google.ca.              345600  IN      NS      ns1.google.com.

we have 30 servers in the ANSWER section which is probably not so
elegant.
does anyone know how its done?