"You want a bone in your mouth?" Matt asked.
"Yeah!" Billy exclaimed. His tongue lolled out and he started panting as Matt unzipped his fly and took his dick out. Billy dove to Matt's crotch and started sucking. Nobody around them seemed to care -- just normal slave dog boy activity.
Billy waggled his butt, his tail plug bouncing. "Goooood boy," said Matt. Billy's mouth was so eager. "You like being a little slutty slave, huh?"
Billy took his mouth off Matt's dick. "Yeah man!" He barked happily. "Matt, it's so great. Your dick tastes amazing. And I love being naked in front of everyone!"
"Good boy," said Matt, rubbing Billy's head. Suddenly Billy got an idea.
"Hey, do you wanna know what it's like to be a slave?" He said. "I can show you!"
"How's that?" Said Matt.
Billy quickly lunged for the wand and grabbed it in his mouth. Matt looked startled. "Hey, wait a minute dude," he said.
"Now you can be a dog boy too!" Said Matt, his voice muffled around the wand.
"No! Wait!" Matt exclaimed, but it was too late. He tumbled forward off of the bench, down onto all fours, and suddenly realized he couldn't remember how to stand in two legs anymore. His fly was already unzipped and his hard cock stuck out. Now his pants started to flop down, exposing his butt.
"Billy! Now we're both dog boys!" He yelped. "You've turned me into a slave!"
"Yeah! So cool!" Said Billy. He tossed the wand to the side, then pounced on Matt playfully. Matt barked in surprise to find Billy pinning him down.
"Come on dude, relax! Enjoy it!" Billy barked.
Matt pushed himself back to all fours. "No man! I gotta change back!"
He started to trot back over to the wand, but Billy snuck up behind him and put his nose right up against Matt's butthole. Matt froze in shock as Billy took a deep smell. "Wha... What are you doing?!" He asked. It felt strangely good.
Billy just barked and licked Matt's taint. Suddenly Matt wanted nothing more than to do the same to Billy. He circled around and sniffed cautiously at Billy's butt. Billy watched and presented his ass to Matt, and Matt took a whiff.
Instantly his brain flooded with pheromone information. He could tell all kinds of things about Billy from his smell, but the most important thing was that he somehow knew Billy was an alpha dog. And he, Matt, was definitely a beta.
Matt whimpered and Billy grinned. "Dude, I'm going to have so much fun with you," he said. "You're all mine now."