What happens during a cluster seizure?
Cluster seizures are typified by a seizure, then a return to a normal baseline, then another seizure. For many animals and humans, having one seizure can make them more susceptible to a second seizure in the near future, though veterinarians and researchers are still unclear as to why.
As the Epilepsy Foundation says, a current key question in epilepsy research is whether the onset and duration of cluster seizure episodes are random, or whether they adhere to some kind of pattern, and might therefore one day be predicted and prevented.
Are they dangerous?
They can be. All seizures carry the risk of neurological damage, so the more seizures a dog has, the more likely they are to suffer some kind of lasting effect from their fits. With cluster seizures, physical injury is also a risk, as dogs recover and then unexpectedly renter a convulsive state.
Because cluster seizures are normally quite unpredictable, they also have obvious risks when compared to single or focal seizure, that may show more warning signs, allowing owners to better prepare.
In addition, the prolonged duration of seizure clusters simply adds more risk to the situation, whether that’s due to possible breathing difficulties, or more trouble recovering afterward.