Kat smiled and made arcane gestures. Suddenly, Dan was human again, except for the ears and tail. "You're right," she said. "Making everyone think an anthro rabbit was normal is a pretty tall order for even an experienced witch, let alone a rookie like me. This way, though, people will assume it's a costume all by themselves, and if they find out otherwise you can just make up some explanation. And you know, I'll even let you keep a little of the enhanced leg power and sense of hearing and smell, since I'm feeling magnanimous. Still, it lacks a certain something..." She brightened suddenly and made some more gestures.
Dan suddenly felt himself shrinking; he stopped at about four and a half feet tall, and he yelped in surprise, only to find out that his voice was back to the high-pitched squawk it had been a few years before. "Thirteen years old again," Kat said. "You'll be in the early stages of development when we're done with you." Dan wasn't sure what she meant, but he didn't like the sound of it. He tried to bolt, but he was paralyzed. Kat laughed. "You seriously thought I'd letyou get away? Besides, did you think that would stop it?" Dan shrugged.
Suddenly, a lot more changes set in. Dan's scrawny thirteen-year-old frame filled out in exactly the wrong way, becoming slender but not bony, padded with baby fat, with hints of curves to come. His face also softened, becoming delicate but just a little pudgy, as his hair grew down; when it stopped, it was longer than before, tickling at the base of his neck. It had also changed from brown to a fiery red. Much to Dan's surprise, there was a tingling in his chest as it pushed outwards, forming into two small breasts.
Suddenly understanding what was happening to him, Dan pleaded with Kat to change him back, his voice now a slightly nasal soprano (though it would mature into a much softer, less nasal high alto.) "Well, Danny," Kat grinned, "we'll see. If you're exceptionally well-behaved, I might change you back ina couple weeks. But for now..." She gestured again, and abdominal pain wracked Dan's body during the final change, which left him indisputably female. Kat waved her hand one last time, and Dan was suddenly clad only in a red leotard with a hole cut for her tail.
"Lookin' good, Danielle!" Kat smiled. "I like you as my new little sister. I bet you're a smash hit when school starts tomorrow!"
Dan(ielle) gawked. "Sch-school? I can't go to school like this! What'll my friends think!?"
Kat shrugged. "Most likely they won't know you at all, since everyone outside our family thinks you've always been a girl five years younger than me. It's a lot easier to do a reality change when the transformee has become something everyone believes in, although they'll still think the ears and tail are fake until shown otherwise."
Danielle couldn't believe what she was hearing. People thought she'd always been this way? "But you said Mom and Dad know about this! They'll stop you!" she blurted.
Kat smiled. "First off," she said, "it's true that Mom's also a witch. But us witches don't like to mess with other witches' spells. Interaction of magics is a tricky business, and with a change so unharmful, Mom's likely to have you wait for me to change you back. If you're really unlucky, she'll think you ought to stay a girl or view this as a learning experience. Best just to wait, if you ask me."
Danielle groaned. It looked she was facing a couple weeks as a pubescent bunnygirl.