I used Hartz on both of my cats. One of them is perfectly fine, while the other has died. Less than a day and a half. The were no warning signs. I woke up to my wife saying she couldn’t find her. Now this is my baby, I am talking about. I jump up and look to find her dead beside the dining table. My heart is broken and had to have her cremated. Anything I can do, other than be really sad.?