Both Tito and Bimbo are homeless. Bimbo is a parent to Tito. Tito has been blind since birth, he was abandoned too.
Mt. Vesuvius is erupting and the towns people aren't aware.
On page 436 Tito and Bimbo can hear men arguing about the smoke coming out of Mount Vesuvius. According to this page, the text cites, "That? Tito can hear a grunt with one question answered another. That's always there. We use it for our weather guide. When the smoke stands up straight, we'll know we'd have fair weather; when it flattens out, it'll sure be foggy; when it drift the east- yes yes cut in he edged voice, I've heard about your mountain barometer. But the column of smoke seems hundreds of feet higher than usual and it's thickening and spreads like a shadowy tree."
We're the Protagonist!!
In the story, Bimbo and Tito haven't done anything wrong. They haven't caused a problem at all. A negative action that Bimbo and Tito had done is stealing from the bakery,but, they had to do it for survival.
Mount Vesuvius is the antagonist because the destruction the volcano had made killed thousands of people and caused massive destruction to Pompeii.
I'm the antagonist!
Through out the story, the theme is mount Versuvius erupting. First it talks about the smoke coming out of the volcano. Then it talks about Tito waking up hard to breathe and all of it become a big disaster.
The theme of the story is Mount Vesuvius is Erupting.
For example, Pompeii didn't have 3 feet of lapilli covered on the floor.
The author's purpose to writing "the dog of Pompeii" is to write a fictional story of Pompeii.
Through my perspective, I think, Tito is the dog and Bimbo is the boy.
I think this because Bimbo is the one getting the food and taking care of Tito instead of Tito taking care of Bimbo. On the other hand, Tito is always sleeping and following Bimbo. It should be the opposite