Write a short story about a thief who steals from a junkyard that has an imposing guard dog who talks. Do not give either character a name and do not gender the dog.
A man approached the junkyard gate, his eyes shiftily scanning the area. He was about to take his first step inside when a deep, booming bark stopped him. 

"Stop right there! What is your business here?" the booming bark said.

The man jumped, his heart racing as he turned to see a huge, imposing guard dog standing just beyond the corner of the entrance. The dog's eyes were fixed on him, its teeth bared in a threatening snarl as it growled deeply at him.

"I...I'm just trying to find a few parts to fix my car," the man stammered, his hands shaking as he stared at the beast.

The dog's eyes scanned the man up and down, its gaze assessing every detail of his appearance as it sniffed the air, taking in the man's scent. Something seemed off about him, and the dog wasn't sure if it should trust him.

It growled low in its throat, "I'm keeping an eye on you. If I see anything suspicious, I will alert the owner, and if I see you try to steal anything, I'll bite."

The man nodded, as the dog let him inside. The junkyard was filled with all manner of broken cars, metal appliances, and other debris. The man wandered through piles, his eyes still scanning around shiftily til they lock onto his prize.

A moment later the dog's growl is heard. "Hey, what are you up to?" it barked. "I warned you didn't I!?"

The man had been caught stuffing the part he was looking for into his shirt. Instead of giving himself up, he immediately fled as fast as he could with the dog angrily behind him. Quickly the man barely managed to climb the junkyard fence just in time before the dog could grab a bite out of him.

As he continued running away from the junkyard with his prize obtained, the man could hear the dog quietly whimper, "Dang, no treats for me again..."