If your dog is experiencing what appears to be a seizure, you should contact your vet immediately. There are many potential causes for seizures in dogs and environmental toxins are among the most common. Some of the most common toxins that can cause seizures in dogs include lead, pesticides, and radiator fluid. If you think your dog may have been exposed to a toxin, contact your veterinarian immediately. But in this post, you will find out all about what toxins can cause seizures in dogs and more.