I have a border collie/coon hound mix who has has seiziuers. I did some online research and switched him to a dog food and biscuits that are BHA/BHT free. I also switched his heart worm meds from Heart Guard to something else. Except for the time he got into something outside and gfot very sick, he has been seizure free since the switch. There can be many things that trigger them but this seems to have worked for us. Border Collies are know for inheriting this problem.