Use DC/DNS servers only for AD domain queries?
You could use your local router as a DNS, and make the router lookup on the remote DNS server, the important detail there is that the router will cache the result, so he will not always go to remote server for the resolution.
I’m not sure why you need this: is it to reduce the load on the AD server? Many enterprises specify a DNS server system such as Infoblox as their primary resolver and then within it they specify forwarders whereby companyname.xyz is sent to AD. DDNS update comes via DHCP and in the DHCP config it would specify which server(s) to notify about DDNS.