My 13-year-old indoor cat has been on Phenobarbital for frequent strong grand mal seizures for 9 years and has not had seizures since starting it. We have fleas in the house for the first time (unknown source) and my 3 cats got a 5-day supply of Capstar from the vet. What else should I do to safely treat the house and the cats? I'm very afraid of causing her seizures to start back, especially since her paws have been twitching since starting the Capstar 3 days ago. Thank you.