I spoke with the vet and she said it was fine to use Advantage on Sampson. That is the only treatment that he can have.
I put it on him this afternoon. No side effects. I only used half a dose. He will get the other half in two weeks.
All the bedding is washed and I am vacuuming when I can. I sprayed the couch, mattress, and rugs with alcohol. Haven't had another bite.
Diatomaceous earth is supposed to be an organic way of killing the fleas. It
breaks into a fleas' exoskeleton and dehydrates them.
I haven't tried it yet.
Thanks once more for your input.