I just wanted to say THANKS to all of you who posted warnings about this product. I have a Papillion & noticed he had a couple fleas. I saw the Hartz Ultra Guard product at Target & thought I would try it because Hartz was a well-known brand. I applied it to my dog this morning & then thought maybe I should see how this product is rated online. I had NO IDEA it was a dangerous product!! I am so glad I ran across this website. I immediately called my vet & asked them what I should do. They said WASH IT OFF!! They said it is not a safe product & not effective either. I feel like an idiot for not doing research ahead of time. I am just thankful it was only on my dog for 1 hour. He seems to be fine right now. Needless to say I threw away all Hartz products (I had some old shampoo too) and will NEVER buy Hartz again!!!!! Wish there was a way to get this stuff off the shelves!!!!