My first dog, Sheba, was a spayed female, best guess German Shepherd maybe Doberman mix. She was THE leader of the neighborhood dogs, gender notwithstanding. She always lifted her leg especially on her "morning rounds" through the mile-or-so square she regarded as her territory and marked trees, etc.

She had been a stray before we got her, so we don't know where she learned it from, but she was the smartest best dog in the whole world! Seriously, she was by far the smartest dog my family ever owned.