Finally getting his pants down relieved some of the aching pressure on John's lengthening spine. It also gave him a much better view of the twitching appendage that was jutting from his behind. It was only a large, bony lump at first, but kept growing longer and more enjoyable to wag around as John watched it. He grinned and wagged his tail harder. Before it had even reached its full length, both John and the shopkeeper had noticed silky black hairs growing on it, which contrasted noticeably with the much lighter hairs sprouting closer to the tip.
"Hm, if I had to guess, I'd say you're becoming a collie," said the shopkeeper, startling John and reminding him that he was standing there with his pants down in front of another human being. His shaggy black and white tail dived between his knees while he stood straight and tried to pull up his underwear and jeans. Unfortunately, he couldn't quite manage to put them back on properly, especially in the back where they were getting blocked underneath his tightly tucked tail. The shopkeeper laughed.
"Don't worry. Your little stripper show that you were putting on for me already ended minutes ago. I'd say your use for pants is fairly minimal now. Wanna take a look?"
Cautiously, John lowered his pants just a little, and then even a bit more. Wide-eyed, he pulled them all the way off and let them flop to the floor. He hadn't noticed this thick forest of fur growing all over his groin while he been fixated on his new tail. It was so thick that he almost had to sort of fish through it to even find his own penis! One of the first things he noticed when he did was that it felt oddly different somehow. Firstly, it was thoroughly attached to his torso instead of dangling between his thighs. Secondly, the fuzzy tube-like structure he was patting was actually the sheath that his new bony dick was wrapped up in. Tugging down on it a little, he saw his brightly colored tip appear briefly right at the end of this structure. Although John had been around animals enough to know what a dog's anatomy looked like, the fact that this arrangement was actually his now was rather surreal, along with the fact that he hadn't even noticed these intimate changes and had been exposing himself to the shopkeeper all the while.
"This, this is, um, pretty weird..." he said weakly.
"Maybe for you, but it's nothing pet shop owners like me don't see under there merchandise every day," said the shopkeeper in a half-interested voice, a smug smile on his face. "Anyway, if you just wanna run around naked for a while and work off some of that sheep dog energy, I'll just go back to my office and start filling out the paper work. We've got toys everywhere if you decide to play with some. Any preference for a dog name while you can still talk? Your owner might change it anyway, but it would be nice to know what to call you while your here."
"Uh, I don't know, how about ... um ... Mitch? Yeah, Mitch sounds pretty good, I think," Mitch answered, half present, his attention having been draw from his groin to his hands. He was staring at his newly furred fingers and the claws that were growing out of them. The shopkeepers smiled and turned toward the office. "Mitch it is, then," said the keeper with a smile.
Mitch heard the door close and then looked around. He smelled the treats in the pet food aisle and sniffed longingly at them. He also got a nice view of the dog toy aisle and realized he actually did feel a tremendous amount of energy welling up inside him, more than he'd felt since he was a little kid. He wagged his tail playfully and started to pant. What was he going to do first?