My dog suddenly started having seizures, and he is a little over 5 years old. My vet suggested one thing I could try is to put him on a grain free diet. I am currently feeding him Taste of the Wild grain free food. I am not sure where you are located but here we have several foods that offer a grain free option. I have noticed improvements in him, especially with itchy ears and such. I guess I have a dog that cannot tolerate gluten either, go figure!
Yes, for me it's usually the next day. Sometimes it takes two. I get depressed and lethargic. If a headache is going to come, it is the first to show up--usually within hours! What's so weird about this "disease" is how different and similiar it is for everybody!