Well the Cajun squeal is a little different than a regular mallard call... To make the squeal take a little volume out of the regular quack, add little more pressure with your tongue and lips. Keep trying with mouth pressure... you’ll get it very quickly..
"Thomas Jefferson said I had a God-given right to pursue happiness. What makes me happy is to take a mallard's head smooth off at about 20 feet.
Lanyard: KM Custom Cut (hand),KM Cut red label Black Monster #1,RNT Timber hog,DS mondo,6n1 whistle