For every pet owner, there’s one animal against whom all others are measured. For me, it was my dog Abercrombie. Then we got Brian. — Abercrombie was a black lab mix puppy my dad brought home after he saw a note posted on the bulletin board at the Pentagon where he worked. We’d always had black lab mutts in our family, their fates a sad mix of heartbreak. Smokey, the dog my parents had when…