Justin hung up the phone, going back out onto the porch, sitting down and petting the two dogs, not noticing the blond hairs on the back of his hands starting to thicken.
Justin sniffed the air "Hmm you guys smell pretty good for dogs... aww you guys aren't fixed," he says seeing their red rockets poking out from the pleasurable petting. "Horn Dogs! But cute ones at least.
Meanwhile Andy and Greg are chatting...
'Dude, master's scent is starting to change. Mmm smells good, like you!' Says Andy.
'Yeah I know dude, look at his hands, you think we spread it to him?' Greg replied.
'I hope so!'
"Wew, sure is warm out today" Justin says reaching a hand up, scratching at his stubbled neck with his slightly longer fingernails and pulling at his collar.
"What the?!" he says as he lowers his hand, seeing the hairs on the backs, his nails a little darker in color. Another whiff of the dogs hits his nose, causing him to groan, his cock twtiching. "Did you two do this to me?"
'Sure did master!' They both barked in unison, their tails wagging.
"Wait, did you guys just talk?" Justin asked as he started pulling off his hot shirt.
'Wow you can hear us now, you must be changing!' Greg said with a smile.
"This is freaky, I'm talking to dogs, what's happening to meeee" Justin whined as he looked down at his chest, his stomach thin, hairs spreading up it.
The dogs watch as his nose darkens, teeth starting to lengthen.
'We made a formula at school to make us hairy and it made us like this, it must be still on our skin.' Andy replied.
'And I think you are liking it' Greg says as he pushes his snout into Justin's tented crotch, causing him to groan in pleasure.
"No, this isn't right!" Justin said jumping up to go back inside. His pants and boxers quickly slipped off his thinning waist down to his ankles as he got up, causing him to fall forward onto his hands and knees.
Andy quickly moved up to Justin's side, giving his ass a lick as it grew blond fuzz and the start of a tail began to grow. Justin tried to get back up, but moaned in pleasure at the attention and finally gave in as his face pushed forward slightly, his ears flopping over.
Greg moved below Justin's hairy thin stomach, licking at his crotch and balls as they changed. Justin's balls covered in fur as his foreskin grew back his cock stretching longer and streamlined. He howled in pleasure as the pair pushed him over the edge just as his changed stopped.
"Fuck that was... amazing!" Justin said as he slowly stood back up.
'Hey you stopped changing! No Fair' Andy said.
'Hmm the formula must have a half life to it, only passing on half the effect with each infection down the line, he looks half dog to me' Greg replied.
While the two dogs talked Justin had made his way inside, standing naked in front of a mirror amazed by his new hairy body. "What are we going to do about this?" He said with a canine whine.