Photo manipped by  Magus131 If you like his work and want to see some NSFW images, please support him on Patreon at Patreon.com/MagusTFs

Zach had always enjoyed kayaking with his buddies, although he wasn't the best at it. But this time, when he inevitably overturned his kayak and fell into the water, something felt different. As he focused on righting his kayak and getting back in, he failed to notice his chest was significantly hairier than before. His nose still felt a little wet from the water, but he wasn't too concerned with that. He was hearing noises in the woods that he had never heard before. His ears perked up at the noise of a critter on the bank of the river. He looked in excitement at the critter, his ass shaking back and forth excitedly. No - not his ass, something else. He turned around and saw a tail - his tail - wagging happily behind him. Taking stock of the rest of his body, he noticed a hairier chest, a new puppy nose, floppy ears, and two new pairs of teats running the length of his chest. His tongue lolled out in excitement. He was ready to be a good pup for his best friends.

(Not my best work but oh well)