Step 1: Acquire plenty of marbles, and a long tube at the size of the marbles.
Step 2: Put the tube into the chickens beak.
Step 3: Load the tube with marbles. If the chicken hasn't swallowed the marbles, proceed to...
Step 4: Ram a long, thin pole down the tube, forcing the marbles into the chickens stomach.
Wait silently in a trash can and stalk the chicken. In the dead of night jump out and assrape it! once is squaks for help shove them in and use a stick to force them down. /evil