I thought I was doing something good for our cat and now am sure I contributed to her death. Last week I purchased HARTZ tick&flea drops at our Stop&shop. It was 15.99. I read all directions, applied drops to back of neck and within minutes she was running around all crazy. I tried to wipe some of the drops off. A little bit later I decided she was having a seizure of sorts and she bolted for the door. It has been over a week and we are sure she has died somewhere. After going on-line and reading all the blogs and viewing the videos we are sure that she had a reaction the the HARTZ! That product should not be sold and should be removed immediately from the shelves!!!!!If I can prevent one other person from harming their pet I will. We are devastated at our loss and have terrible guilt that we harmed our family pet.