I would also contact the bread and soda companies. Most likely , it's sheer coincidence that you got two effed up pieces of produce, but it's just barely conceivable that there is something more going on here, and this was a test run. Not necessarily terrorism, though...Remember the tylenol killings?
As for the pudding pamphlet, that's probably nothing. There are people out there who do nothing but run around sticking that stuff into magazines for sell, produce, library books...This is especially true of Jack Chick's stuff.