Dog Seizures

We have a 2 yr old Sheltie cross who suffered a concussion last year resulting in a 2 minute seizure. That was in November 2006. This last weekend he had another one that lasted 1 minute. The vet says there's nothing we can do for him but keep him comfortable while he's having an episode. My question is, is there anything we can include in his diet that might extend the time between episodes? Is there anything I can put on him during a siezure that will help? I've heard the Natives used to crush Valerian root and lay it on the head of someone suffering a seizure, would that help? I just hate seeing how scared he is after he comes to, I want to do something to help!

I am assuming your dog is not on any pharmaceuticals, given none were mentioned.
In my experience, a good, homemade diet goes a long way to stablise the nervous system as well as strengthen general health. Please see the work of Richard Pitcairn, "Natural Health for Dogs and Cats", "The Complete Herbal Handbook for the Dog and Cat" by Juliette de Bairacli Levy and "The Barf Diet" by Ian Billinghurst for further information and recipes. In addition, herbs such as St. John's Wort (Hypericum perforatum), Skullcap (Scutellaria lateriflora), Oatstraw (Avena sativa), Vervain (Verbena officinalis) and Valerian (Valeriana officinalis) may also be of use. B complex vitamins can be helpful. I haven't heard of employing Valerian in the form that you describe above, but it may work. Try and see!