The Collaborative International Dictionary of English v.0.48:
Peck \Peck\, v. i. 1. To make strokes with the beak, or with a pointed instrument. --Carew. [1913 Webster] 2. To pick up food with the beak; hence, to eat. [1913 Webster] [The hen] went pecking by his side. --Dryden. [1913 Webster] To peck at, (a) to attack with petty and repeated blows; to carp at; to nag; to tease. (a) to eat slowly and in small portions, with litle interest; as, to peck at one's food. [1913 Webster]