I recommend you read the following article, as it covers over 10 different models of epilepsy, including in rodent models.
Other articles also suggest using rodent models for in vivo epileptic studies.
Kandratavicius, L., Balista, P. A., Lopes-Aguiar, C., Ruggiero, R. N., Umeoka, E. H., Garcia-Cairasco, N., Bueno-Junior, L. S., & Leite, J. P. (2014). Animal models of epilepsy: use and limitations. Neuropsychiatric disease and treatment, 10, 1693–1705. https://doi.org/10.2147/NDT.S50371