"Ouch!" Joel shouted and Frisky yelped as the needle passed through their flesh. However, it was Joel who got injected with the experimental serum, now contaminated with Frisky's blood. Big brother Stan got free of the pile and stood up. "A couple of klutzes! You two are made for each other. Take her for her walk!" Then he left.
Joel yanked the now-empty syringe to free both of them, and rubbed at the wound in his leg while the Great Dane licked her tail. This had ruined everything! Then he felt something odd and looked at his thigh - the hole from the needle was gone - not only had his skin healed, but it was sprouting hair that quickly spread out over his leg. Tan hair, just like Frisky's!
"Oh, no!" Scrambling up, Joel stumbled for the door, only to fall and knock it shut as one leg changed into that of a dog. Burning pain swept through his body, so great all he could do was clench his teeth as his body stiffened. New muscles pulled over his butt, and he felt a tail emerge. Fur swept up his sides, covering a chest that barreled out.
"No! Stop it!" He managed to look down in time to see his hands, which he needed to work any kind of antidote, reshape themselves into massive paws with thick black nails. A moan turned into a low whine as his throat stretched out, and then vision, sight, and sound all changed - his face pushed into a muzzle, and his tongue lolled out. Finally, the pain faded away, leaving him stunned.
Frisky sniffed him and wagged her tail happily. She was very interested in him, even more than she had been before. Joel struggled up to his four legs, a little surprised to find that being a Great Dane felt fairly normal. His brain had changed physically - there must be some mental changes going on, too!
He drank in her scent, then turned back to check himself. No wonder she was interested!