As for epilepsy, I would be surprised. At 10 your dogs are quite old, and usually epilepsy shows up in youth.
However, if it should be, don’t worry. Pheno as mentioned is very effective. Few cases are so bad they cannot be controlled well. Although, I say this from a human perspective, my dad having suffered for some 60 years now.
Needs to be mentioned that sight hounds can not tolerate any barbiturate.
Ten isn’t old for a toy or miniature poodle. Had one to live until 19. Bigger the dog, shorter the life.