A dog can convulse for a number of reasons, including epilepsy, brain tumors or an infection. It can be frightening to witness, but there are ways to handle the situation that will help the dog come out of it more easily and possibly prevent convulsions that may occur in the future.
Instructions
Remain calm. It is scary to watch a dog have a convulsion, but remember that most dogs are unaware of what is happening to them, and it is not usually painful for them.
Realize that it is not possible to stop the convulsion from happening once it has started. Instead, focus on making it easier for the dog to come out of the convulsion; tell people to remain quiet, and keep the dog out of the light by turning off lights, closing curtains or shading the dog if it is outside. Do not move the dog, unless it is at risk where it is. If there is anything nearby that could hurt the animal, remove it from the dog's vicinity.
Make a mental note of what happened before, during and after the convulsion. This information will be useful for the dog's veterinarian.
Call the veterinarian right away; he may want to check the dog out immediately and can give guidance on what to do next.