Colusa does not have Corgi ears .... right at the end of the story, they said she was a Corgi/Border Collie mix or a Borgi. Since the guy they got her from breeds Corgis, this must be a deliberate “designer” or “boutique” dog .... a hybrid. “Borgi” is on the list.
http://www.dogbreedinfo.com/hybriddogs.htm
Corgi BC mix could probably be ten IQ points above Moonbeam.