
Sorry to hear about your dog, it's so upsetting, I lost my SBT earlier this year due to a brain tumour that caused seizures.
I have come across the suggestion that rosemary and other herbs can be a factor in seizures, so have most of the dog food companies and they process the herbs to remove the element thats thought to be the cause.
You can get in touch with the food company and ask though, most are very helpful.