Alex / "The Seeker"
The dog you seek exists. It is currently annoying a professional trainer by chewing a tug toy and barking at a fallen leaf. It is ready at 6 AM. It is rough on the sleeve. And it will sell its soul to hear you say "good girl."
That phrasing sounds like it's straight out of a romance novel dating profile
"Working line [Belgian Malinois / Dutch Shepherd / GSD] puppy with full grip and biddability"