(im the owner of the cat in the newest story on the page, my mother posted that, i have a little follow up though)
I currently work at a supermarket in southern california, and after having this experience with hartz, I decided to bring it up to some of the higher personnel. Upon hearing my story, they called either the buyer or hartz themselves (not quite sure), and the next day i received a call at work from a hartz representitive who wanted to ask me some questions about my cat and what had happened. I was told by him that they were going to cover all vet bills and that they would call me back in a week or so to follow up on the incident.
I guess it shows that we can do something to either make hartz revise their products, or try to get them pulled from shelves!