Along the way, he and his friends are putting their lives at risk. But that hardly matters.
"I'm here because I'm a local and this is my community and local people," he says. "We take care of one another down here."
If you happen to be in Louisiana these days, you will likely hear that same refrain a lot. The nation's worst disaster since 2012's Hurricane Sandy has seen at least 13 people killed, and thousands more displaced.
6,900,000,000,000 gallons of water in a single week will do that.
But while around 20 parishes are underwater, heroes are also rising to the surface. People like Pettit. And Mike Anderson and Darrell Watson, who have been saving dogs, literally, from death's doorstep, since the disaster began.
People who see every life as precious and worth saving.