Atticus is older than other parents and his devotion to reading sometimes embarrasses Scout and Jem. When he gave them air rifles for Christmas, he did not teach them to shoot but told them not to shoot mockingbirds as it is a sin to kill them. Miss Maudie later explains that mockingbirds only sing and do not harm gardens or nests, so it is a sin to kill them. One day, a rabid dog appears and the sheriff says only Atticus can shoot it from far away, which he does in one shot. Scout and Jem are astonished to learn Atticus was once the best shot in the county.