The Vet thinks her heart failure just got dramatically worse for unknown reasons. He's keeping her today to start her on some injectable Lasix to help her pee off the fluid. She's put on almost 2 lbs of fluid in 2 weeks. He might keep her over the weekend.
He thinks the heart not being able to pump well enough because of too much fluid has caused the increase in seizures.
While this isn't great news, it's better than what I thought would happen. I thought they would tell me it was time to put her to sleep. Prayers are working.