Like most dogs (and people), Lola has an inborn need to have purpose in her life.
From about Day One, I realised that the Pug’s full-time job is clearly to be The Boss of Me, and she performs that duty admirably. So why on earth wouldn’t she also be The Boss of Sheba, the downstairs neighbour’s large, snorting Shar Pei?
As long as they stay this far apart, everything is right with the world. Sheba, you see, is a dear to her people, but would likely, I think, love to turn a certain small, black pug into a mid-day snack.
Pug, stick to bossing your people around, and things will work out just fine.