|Anything| is probable. We're in a city with limited food. A with monsters that need to eat and that come into apartments. Monsters that look like barrels but they explode. It's possible one of the Barrel Spiders could have managed to get in your apartment and blown up the dog. There are radians in this set who fight and kill monsters. If they see a monster in the apartment, a designated "safe zone" or some other garbage, it's very likely they'll kill it. There are radians who break into other's apartments on a semi-frequent rate. It's probable some will be inclined to kill monsters.

And due to an extra digit in my own apartment, I have made precautions. To stop stupid 000s from getting in, I keep the entrance locked or blocked off. To keep it from wandering around the entire complex, I limit its own functions. And finally, it's not edible.