'Walking Dead' actor Norman Reedus bitten by fan at NJ zombie convention

A picture that actor Norman Reedus recently posted to his Instagram account is raising some eyebrows. In the photo, shared Monday, the " Walking Dead" star has "DO NOT BITE ME" scrawled across his shirt -- and apparently, with good reason. Reedus, who plays Daryl Dixon in the AMC series, was reportedly bitten by a fan…