Sentence:  Anyhow, one of them fell, another one <WSD>pecked</WSD> badly, and Jerry disengaged himself from the group to scuttle up the short strip of meadow to win by a length. 
Meaning of the word marked with <WSD> tags:  To lurch forward; especially, of a horse, to stumble after hitting the ground with the toe instead of the flat of the foot.