BLACK AND SHRIVELED? YOU MEAN TOTALLY NECROTIC?
THIS USUALLY HAPPENS FROM INJURY IN BOBS. THEY ARE VICIOUS TOE/ FOOT/ ANKLE PECKERS... ITS STANDARD OPERATING PROCEDURE FOR BOBS. THEY LIKE THE HOBBLE APPROACH. SEEMS ITS HARD TO OUTRUN YOUR BULLY IF YOU LIMP BAD ENOUGH~ THUS THE BEATINGS CAN...