Red to Black, Venom Lack

Chase has a book about snakes that he loves to read. (He also likes Riki-Tiki-Tavi because of the snakes - typical boy!) The book teaches the 'Red to black, venom lack' rule, and Chase repeats this often. Yesterday he pretended to be a dog, and he told us his name is 'red to black, venom lack'. He must be a snake-huntin' dog!