I caught a snake killing my 4 week old chicks last Friday night, lost 3. Sunday I lost 3 more during the daytime. Something pulled their heads off through the 1"x 2" wire.I put 2 feet of hardware cloth around the bottom of the run. Someone told me to put a light and radio on a timer in my building and have them come on a little after dark and turn off before sunrise. I left 3 live traps set too. Tonight when I got home from work I went and checked on all my chickens. 6 coops/runs, 44 birds. That was about 12:30 am. All was fine. I went out 2 hours later and had a coon in one trap and a possum in another. LOL. Something was pretty close out in the woods making a "quack" sound. Wonder what that was? Another coon? All this time I've had chickens I've only lost one until now. That was a hen that ran loose all the time and went broody and something got her. Besides a duck, what makes a "quack" sound? Thanks.