The Collaborative International Dictionary of English v.0.48:
Cackler \Cac"kler\, n. 1. A fowl that cackles. [1913 Webster] 2. One who prattles, or tells tales; a tattler. [1913 Webster]WordNet (r) 3.0 (2006):
cackler n 1: a hen that has just laid an egg and emits a shrill squawk 2: any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae [syn: babbler, cackler]