John had a boney skinny tail at first, as it animated moving from side to side, hair began to grow onto the formerly dead limb. thick orange hairs grow in at the base and body of the tail as a small white ring grows in near the tail, the tip itself becoming a jet black. John just watched as the growth happened, the new limb bringing him so much joy that he didn't take note of that he was still flashing the old man. John's penis and testicles were changing while he was distracted by his own tail, the balls swelling up and shifting down his body as the shaft grow longer and thicker, turning cherry red. even as his foreskin thickens with fur before attaching itself to his sternum to become a proper canine shaft, John was busy running his hands through his tail playfully.
The old man wasn't sure to want to say to that but coughed to get John's attention who took note of his pants still being down. John much still has some amount of human modesty left in him as he pulled up his pants so quick that they rubbed his groin. Sending a quick burst of pleasure up his spine. John shivered, the old man not really pointing out that he'll be an animal soon so it won't matter if he was butt naked or not.
"I'll start filling out the adoption papers, feel free to tryout any of the toys, food, and more. I'll make sure they will go with your new owner when you fully changed." the old man said as he picked up a clipboard and starts filling out the paperwork.
"ok...thanks for this...whatever its called...ill go see what I need when I'm full..fox?" john said awkwardly as he went to adjusted his pant for his fox tail.
"no problem and what should I put for the name unless you want to use your human name" asked the old man
john thought for a bit before answering "Dexter sounds nice"
"ok Dexter, have fun now." the old man said as Dexter felt the energy flow though him again, filling him with a need to act out his inner animal as he ran through the halls to bring out his inner animal.