We bought some one spot flea drops for our cat, Princess. We put it on at 9pm and by 11pm she was running wild thoughout the house. When she stopped running crazy, we noticed she was panting and foaming at the mouth. Her back was twiching and her eyes were glazed. I called the emergency vet who advised me to wash the product off right away and call back if she didnt seem to calm down. Fortunatly she was only left with a rash about the size of a quarter on the back of her neck. The problem is, I know Hartz will stop selling some of they’re products in the US soon, however, there is no plan to stop selling the same products in Canada. That means that all Canadian cats and dogs will still be at risk. This product is dangerous. Please do not use it on your animals.