My dogs name is Goliath, he is a 13 year old Boston terrier. About a month ago I purshased Hartz ultra guard topical. It was for 5-14lbs. My dog weighs 19lbs. So he is over that. I basically gave him less. Well he has been fine all month. Happy, eating, playing. Last night at 4am, out of nowhere he jumps up as if he was frightened, I went to grab him and he has slobber all over him. He got off the bed and seized up. His legs were falling from under him and he dropped and rolled on his side. He was jerking and foaming from the mouth. His heart was racing. After a minute he stopped. He was clueless, couldn’t walk, had to catch his breath, couldn’t even see! He was whimpering until he fell asleep. This morning he got up, went out to potty, and ate all of his food. He is hyper but tired. Could Hartz have caused this? He has went his entire 13 years without a seizure.