We put a dose of Bio Spot for cats on Chip. Within a few hours he was shaking uncontrollably and having a seizure. Took him to the Emergency Vet but couldn’t figure out what caused it. The next morning very early he began seizing again. Again to the Emergency Vet. At this point we deduced that he had been exposed to Bio spot. After several days of intensive care including heart compressions he has recovered enough to come home. This was a dreadful experience for my husband, myself and my daughter. Wish that Hartz were held responsible. Cost us almost $2500 to get our Chip back.