She really just wanted to snatch him by the ear and tug him away. Why was he being so obstinate? She wasn't going to leave him here to hurt someone. Or Merlin forbid himself! If she could prevent that then she could and she was determined to do just that whether he wanted it or not.
"It wouldn't make you good, it'd make you careless. Those animals can move fast and you might not be able to transfigure them back. Where would you be then?" She scowled at him, her arms crossing again. "You'd be in a heap of trouble when it hurt someone and you and your guardian would be in trouble."
"Mhmm, sure you are." It was certainly time to label him as someone who had an aversion to the truth. A cousin though? That was probably his legal guardian. "And where is this cousin of yours?" Perhaps she could get him to come here and talk some sense into the foolish boy.