We have had a flea problem this year and treated my 6 year old lab with a Skip Flea and Tick bath and then Hartz Ultra Guard for 60lb + dogs. A couple of hours later I noticed that she stumbled a bit and seemed a little gimpy in her rear legs. I immediately thought it was a neurological reaction and came to look on the web. Had no idea that this stuff was such a problem. Can’t believe this is allowed to be on the market in nearly every discount / department store around. I immediately bathed her in dish soap and rinsed, drying with a towel. She seems OK for now and I sure hope she is OK in the morning. If this product were to kill my dog, there would be a real problem on someone’s hands.