After four of our cats have been horrifyingly sickened and/or died from Hartz topical flea/tick control, I notified Hartz Mountain Corporation. As you may have guess, Hartz is unwilling to accept any responsibility. Admitting guilt will obviously open many legal avenues for pet owners who have lost a loved one to this toxic product. I urge all who have experienced a loss due to any Hartz product to contact the Environmental Protection Agency. Currently, there are many cases being reviewed. Hopefully, if enough people report, chances are good that the product will either be taken off the market or the formula will be changed.