Set a wire pen up with a long string and a stick to hold one side up. Put some bread or scraps in the pen and go hide with the string in your hand. When they step inside the pen, WHAM! Jerk the string and you have them trapped OR get an extension paint pole or a long 2X2 pole or closet pole and nail a 4" 1x2 flat board on top like a perch. Wait till night and walk quietly under the tree where they are. Have a partner to shine the light in the ones eyes you are catching. While the light is blinding them, slowly push the 4" flat 1x2 under their belly and raise it up slowly putting pressure on the bottom of the chicken as you raise the pole. The chicken will step up on the pole and you can slowly lower the pole until you can grab the legs or flip a fish net over the chicken. Hold their beak closed tightly so they won't alarm the other chickens and you can get them all in one night, one at a time. Your partner MUST keep the light in their eyes COSTANTLY until you slip the ney over them. Partner can hold the light and work the net while you work the pole. All this MUST be done SILENTLY. Good luck??