I purchased "Zodiac Flea and Tick for Cats" at a local store in my area and applied it to the back of my cat's neck as the directions stated. Shortly after, my cat of 14 years became ill. I took her to see a vet and spoke to additional vets by phone. All were in agreement that the medicine sold over the counter in stores, including Hartz, has been known to send pets into convulsions and possibly result in death. Sadly, my cat passed.
Why this information is not made known to the public, or worse yet, why these people knowingly sell this product, is way beyond me. Anything for money is all I can conclude!
Currently, I am in the process of investigation and filing a lawsuit against the company. In the meantime purchase pet products through your local vet!
Laurie Molnar