I have a Russell bitch that started having fits about the end of last season, whent to see my vet who is a friend and into hunting,after trying two differant types of antibiotics she was still fitting about once a week , she is now on phenobarbitone 12 .5 mg, half a tab once a day she's been on these for about 6 ish months and only had one fit in that time I was told that she will need to be spayed after her next time in season and that will prob stop the fits , I was told the probable cause was head trauma as she's only small an thinks she's a lion, I still use her now but only in places I