Some of the possibilities include - sabotage a competitor, short a stock, experiment with a food supply to see how you could use the food supply chain as an instrument of terror?
Sabotage...hmm, actually that was the first thing I thought.
First-ruin the trust in pet foods, then the trust in human foods. If one source can be contaminated, so can the other.
When I heard one of the factories was in New Jersey, bells went off. BIG Muslim community in N.J- weren't some of the 9-11 terrorists from there?
How hard would it be to take a bag of this poison and dump it into a batch of pet food?
We all know how much Muslims hate dogs- and that they know how much most Americans love their pets.
Kill dogs- make people paranoid about the safety of pet- and eventually- human food...sounds like motivation to me!
That's a possiblity, IMO. No apologies.