My Zoey is 1 year old. I put this Hartz Ultraguard Plus on my dog 7-28-18. Within 2 hours she was having grand mal seizures! Called my vet, they said wash her with dawn soap! The grandmal seizures stopped for a few days then the little one started!!! 8-7-18 the grandmal seizures started back up again! She had 8 grandmal seizures in less then 24 hours! Took her to the E.R. vet and they said she has full blown epilepsy now! She will have to be on seizure meds for the rest of her life! This company just dont care about our pets. If they did they would take this crap off the market! But no its all about the money they make from it!!!