Apex domains cannot have CNAME records.
Question and response
Question
dig naturallyboulderproducts.com. NS
Answer
naturallyboulderproducts.com. 5 NS ns-633.awsdns-15.net.
naturallyboulderproducts.com. 5 NS ns-21.awsdns-02.com.
naturallyboulderproducts.com. 5 NS ns-466.awsdns-58.com.
naturallyboulderproducts.com. 5 NS ns-1023.awsdns-63.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0