"A slug," Rodolphus says flatly, almost surprised that Severus would ask. He takes off his glasses; he finds them annoying, but wanted to show willing.
"Well that is good to hear." He munches bread. "Lots of room at Lucius' place," Rodolphus offers with a grin. The grin fades. "Maybe," he says cautiously. "But you know I'm not the best potion brewer in the world."