Apex domains cannot have CNAME records.
Question and response
Question
dig thesecretsofdogtraining.com. NS
Answer
thesecretsofdogtraining.com. 5 NS ns1.thesecretsofdogtraining.com.
thesecretsofdogtraining.com. 5 NS ns2.thesecretsofdogtraining.com.
Authority
The response has no authority records.
Additional
ns1.thesecretsofdogtraining.com. 5 A 51.77.119.203
ns2.thesecretsofdogtraining.com. 5 A 51.89.238.72
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0