Not only had Jeff made himself too hairy to be human, but his commands regarding hair color were conflicting because he hadn't deleted the brown hair option, he'd adjusted the color indicator for brown to zero, which was black, and then had selected blond as the new primary color, which turned the black into a secondary color. The Chronivac program ran adjusting Jeff to the species that most closely met the specified criteria. The unspecified data such as "tail", just autopopulated.
Jeff's ears began to migrate to the top of his head as lush golden fur with black spots began to cover his body. Tertiary color default setting was 100 or white. Jeff watched in amazement as he shifted into an anthropomorphic version of leopard. The pain in his trousers compelled him to drop trow to let his new 3 foot tail escape the confines of his pants. Jeff reached for the junk drawer in the niche off the hallway. He knew there'd be a scissors there, and then he could cut a slit so his tail wouldn't hurt. Just then he heard a door open. His sister was coming toward him. He slashed a hole in the seat of his pants, then pushed his tail through and pulled them up. If he'd specified athletic ability, he'd probably be a Cheetah man now and could do 45mph to get out of his sister's way. Still a leopard proved to be not only fast, but stealthily silent as he leapt toward his room, leaving only a slight paw print on the wall next to the stairs.