Okay... so this method isn't 100%, however, it's pretty darn close. Get a metal washer and tie a string of about three to four inches in length to it (I've used dental floss before!) Hold the washer above the chick/chicken. Keep as still as you can. You can let the string hang over your index finger if you want to help steady it or just pinch string between the fingers. Let the washer start swinging on it own. Swings back and forth - BOY! Swings in a circle - GIRL Try it on yourself, your spouse, your children, your dogs/cats, etc. It works. HAVE FUN!!