Apex domains cannot have CNAME records.
Question and response
Question
dig bluecatdns.COM. NS
Answer
bluecatdns.COM. 5 NS ns25.domaincontrol.COM.
bluecatdns.COM. 5 NS ns26.domaincontrol.COM.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0