I think I posion my dog over the weekend. I applied the hartz advance care flea & tick medicine and my dog is acting strangley and has stop eatin. I called hartz hotline # 800/275-1414 and they couldn't tell me anything, but took my information down and asked what I used and what the dog is doing. I did some research and foound numerous complaints from dogs & cat owners and most are cat owners but per hartz hotline, a few dogs have had reactions. How can hartz continue to sale this stuff on the market is beyond me? and why don't they post anything BEFORE hand on the package? Me being cheap and buy this 3 months ( once amonth ) application and now this dog is did a 360deg turn from his normal behavior. I'm giving him one more day and then off to the vet tomorrow. Hartz did mention about giving the vet the above number and having them pass any bills over to them. But this is a bunch of crap.