A snapshot
The Dog, being the territorial creature he is, defended The Office doorway stubbornly. No was was he going to let The Cat in. In fact, The Cat could disappear forevermore, for all he cared; such an annoying animal it was. And anyway, The Dog felt strongly that The Office was his, because The People in it were to be defended at all times, including from The Cat.
Especially The Cat.
So there he stood, guarding the doorway to The Office and its inhabitants, growling softly. And there he stayed, until one of The People told him to stop being a horrible bully and leave The Cat alone.
And The Cat celebrated - as usual - by stalking annoyingly past The Dog and settling down for another day on The Dog's bed.
The Dog gave up. Again.