"Hmm... I don't feel any different, do you see anything John?"
"Carrie, I think your eyes are growing!"
"What?" Said Carrie as she pulled a mirror out of nowhere. "Oh! You're right! They're starting to look like... cat eyes?"
As soon as she said this she felt a tug at her backside and turned just in time to see a long black furry tail finish growing out of her back, as she felt her ears rising to the top of her head.
When she looked in the mirror again, she saw that her eyes had finished changing into large green catlike eyes while her nose and mouth were in the process of becoming more catlike while a thin golden headband had appeared just in time to hold down her lengthening black hair. While all this was going on, John noticed that black fur was growing just below her kneecaps and Carries feet were growing too big for her shoes and socks to hold before they finally burst free and were looking just black and fluffy enough to just barely hide her growing muscles.
While for some reason Carrie still didn't notice that her footwear just exploded off, she did see that her now strong arms were growing black fur that went up to just below her elbow looking almost like long gloves ending in big paw-like hands that had just finished growing her new retractable claws. After it seemed like the black fur finished growing, white fur began to grow over the remaining bare spots on the arms and legs while her still growing body and muscles started to strain her clothing which began to rip and show off her new larger chest and butt which were already halfway covered in fur with a bikini fur pattern covering her butt.
Before Carrie had the chance to cover herself in embarrassment, her ripping shirt and pants were already being replaced by a green cheerleader dress with a gold trim. By the time the transformation seemed to end, the only place that didn't have fur of any color was her head and right above her chest.
"That was AMAZING!" said Carrie in an exited higher pitched voice. "Being a toon feels so good and I look sooo cute! I don't think I ever want to turn back! Oh John, you HAVE to try it out!"
"Alright, if you say so Carrie." "Let's see, do I want a tree fruit, or something from the stand here."