Apex domains cannot have CNAME records.
Question and response
Question
dig regalhounddesigns.com. NS
Answer
regalhounddesigns.com. 3 NS ns-1359.awsdns-41.org.
regalhounddesigns.com. 3 NS ns-354.awsdns-44.com.
regalhounddesigns.com. 3 NS ns-1211.awsdns-23.org.
regalhounddesigns.com. 3 NS ns-1454.awsdns-53.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0