Whenever the dog senses someone is at the front door he explodes in an ear-shattering commotion of vocal violence and door-clawing destruction. Deafness commences and paint is scraped off in neat vertical lines by furious, and improbably artistic, paws. 

At these times, the pup is something of a monster, a fleecy, compact gremlin with the screeching pipes of an F-16 taking off. The transformation from hound to hellion is startling, obnoxious, and comprehensively annoying.

Cubby is a good dog. Cubby is a bad dog. He is both — say, 94.2% good, 3% bad, and the rest is murky amorality. But, Jesus, he is loud. 

His lightning-jag meltdowns — crack! — upend your equilibrium with the sharp jolt of a car crash. They scare the holy crap out of you. And that just pisses you off more.

It’s not unlike a child throwing a tantrum, but those horrible scenes are strictly selfish displays — look at me, gimme me what I want! — whereas what we have here are exhibitions of the dog’s innate sense of protecting his home and humans.

Maybe he gets something out of it — a shudder of heroism, a surge of purpose — though I doubt it’s a conscious ego grab. And for that I reserve steadfast respect. He has integrity.

Still, the outbursts are grating and hair-raising. Imagine a swarm of bees loosed in your living room at 150 decibels, and instead of buzzing, it’s bark-yapping. (Bark-rapping — now that would be something else entirely.) Voices are never raised at Cubby, until he goes batshit for the poor, unwitting FedEx guy. 

In a semi-controlled roar we chastise the dog: Cubby! No! Stop! Shush! And my stand-by: Shut the HELL up! (Throw in another expletive for spice, and accuracy.)

He understands none of it. The dog yelps away, scratching the door, bounding  from chair to couch, having a rousing old time. Or maybe he’s scared, or chasing attention. I visited a couple of dog-expert sites and they were oddly lame and unhelpful. (Although they did say that yelling at the dog is counterproductive. Whoops.)

Thing is, Cubby has no intention of attacking whoever is visiting, be it the Jehovah’s Witnesses or a friendly guest. When the door opens, he stops barking, tail wagging wildly, muzzle madly sniffing. It seems he just wants to mark his territory with the sonic boom of a trusty guard dog. Considering his size, this is both sweet and sad.

Of course Cubby most of the time is chill, adoring and delightfully docile. Belly rubs are his drug of choice. His joyous, jumpy greetings lift you up. You should see the old boy sleeping, nostrils fluttering, legs kicking. It kinda cracks your heart. Silence.