OMG. this stuff is terrible. I couldnt understand that when I put this on my 3 cats they started acting nuts! My older cat took off and just came home. And I know its normal for them to run but this is not right. All of them are spooked it seams and one them them started throwing up profusely shortly after getting his dose last night. He threw up everything including bile he was warm to the touch and cowered away from me which is not normal with him. Shame on you hartz. Just because they are animals dosent make it OK to poison, You wouldnt feed fyour family poison or would you???????????