About a year ago I bought the Hartz flea and tick powder for my cat. I did exactly as it said on the label, making sure my cat was of the proper weight and age. Within 30 minutes she was gasping for air, her muscles were twitching and she was losing control of her bladder and bowels. I took special care not to get the powder near her face so I knew that was not the problem. She hid under the table in a dark corner and before I could get her out to take her to the vet she was gone. I called Hartz and their response was, ” she probably ate something…”. I know she didn’t because she was an inside cat and we don’t even have houseplants that she could have eaten. It was the saddest thing I have ever seen.