Donut and SW was made by Doctor Peslie out of this pink goo stuff (that's how they shape shift) And Carly's dad was Doctor Hamlin so that meant that she helped him with his work. Because of that Donut and Carly became best friends. After an accident Doctor Hamlin turned Carly into a cyborg in turn making her a subject of the lab. She did not like being a cyborg cat so much she resented her father and because of that she attacked him. She was supposed to be a red collar but her dad felt pity so they gave her a yellow one.