Just wanted to warn everybody not to use any over the counter flea & tick repelent on your dogs and cats. We usally use Frontline on our animals,and recommend it. But to save money, we went and got an over the counter brand. We used Spot On for cats, made by Zodiac. Within two hours of applying it to our cats (we have 6) five of them went into seizures. We live 1 +hrs from the emergency animal clinic, so our cats seizures for over 2 + hours. I ended up spending almost $1000.00 dollars on vet. bills. After talking to the emergency vet they say that they see this all the time with over the counter meds. Zodiac is giving us the run around, so we will probably will have to get a lawyer to get our money back, and with the run around and hassle that Zodiac is giving us I may want more than just our bills payed. Five of the cats are doing fine now, one looks like it will have permanent nero. problems. Has anybody had similar problems with Zodiac, Hartz, ect. Our vet says tha the see reactions all the time from these products.