Adding other DNS zones

Adding other DNS zones

We have several internal DNS zones on our AD DNS servers.  However, only the "base," one, our domain name, shows any records being created/changed.

How can we show which records have been changed in the other DNS zones? 

ie:  Our domain name is Corp.local
We have a zone for corpname.com

We see all records created/changed in corp.local

We see any new zones created, such as OtherCorp.net

We do not see any record changes recorded under corpname.com, or Othercorp.net

How can we see these?