The phrase "best doggie" is used to describe a dog that is very good or special in some way.
Sentences with «best doggie»
That would help me learn good doggie manners and bond with my new person or people. (puppyfinder.com)
And we hope this information helps others step up to be better doggie parents. (aussierescuesandiego.org)
The breed isn't known for precise obedience, but these dogs have more than enough intelligence to learn the basics of good doggie behavior. (soonervet.net)