Following the advice of James TerBush of BioSpotVictims.Org, I called the manufacturer of BioSpot, Farnam Pet Products. The phone number for the Risk Manager/Consumer Relations for BioSpot is 1-800-234-2269. If you are making the call, have the box of Biospot that you used handy, and a copy of your vet bill. After getting your information and a summary of the situation, they will ask you to submit the following so that they can refund the price of the product and consider reimbursement for the vet bill:
1. Proof of purchase for the BioSpot product that gave you the problem--either a receipt or the bar code from the package.
2. A copy of your vet bill.
3. A copy of the vet's notes from your visit.
I'm expecting that they will probably refund the cost of the product and will most likely deny responsibility for any adverse reactions and will thus deny the claim to have the vet bill reimbursed.
The reason I am feeling so cynical is that after I talked to the customer service rep, she transferred me to an Animal Poison Control Center, where they said they were not connected with the company that makes BioSpot. The rep there told me that her resident vet expert was telling her that my dog's 4 grand mal seizures after getting her BioSpot dose were just a coincidence, and due to something else. She suggested that my dog perhaps got into some human anti-depressants (there are none in my house)--somehow implying that my dog has opposable thumbs when I am not looking at her and that she is able to wrestle open child-proof lids on drugs that we don't even have.
The Poison Control rep said that she would like to chat with my vet on the phone to explain to him that he came to the wrong conclusion in connecting the BioSpot with the seizures.
It was kind of creepy.
Update, May 2013: The manufacturer eventually sent me a check to cover what we had paid for the product and what we had spent at the vet's office. The check had no indication of what is was in response to, and there was no admission of wrongdoing on their part or on behalf of their product. Leny continues to have seizures about once a month. We will never know for sure if the product caused the onset of seizure activity.