Searched this topic and found nothing so add knowledge by answering. G Comet ate a #7 1 1/4" self tap deck screw I dropped yesterday. Used hand held metal detector to verify it was in craw the size of fist. Hung chicken upside down & tried to make it gag but got nothing but water. My bike was in pieces and it was afternoon till I got it back together. Checked her with wand again before going to find thin 2 foot super magnet. Now her crop was golf ball size & screw gone. Anything you can give to make them throw up?