I applied the Hartz flea and tick medication last night. My dog is throwing up and whining all night. Today he is shaking uncontrollably and urinating all over the house. I tried to wash off the medicine and we are taking him to the vet. I cannot believe how much information is on the net against the use of this product. Who knew? How is it still on the market? I am calling the Better Business Bureau, the FDA, and Hartz on Monday! if my dog dies I swear to God I am going to sue them!