What happens that causes Rab to move out of his customary reserve? A. B. From chapters 5-6

One day, the butcher and his sons play a cruel trick on the Webb twins, two young apprentices at the print shop. They threaten to kill the twins’ cat. Rab and Johnny go and beat up the butcher and his sons. Johnny notices that Rab “was a born fighter—ferocious, utterly fearless, quick and powerful—but he didn’t fight often and he hadn’t much to say afterward” (112).