I remember one time I was sleeping over at a friend's house, and his dog curled up in my bed to sleep. The next morning, I noticed that I had fleas. The conversation went something like this...
"Dude, your dog has fleas."
"No, he doesn't."
"Dude! he does! He gave them to me! Your dog has fleas!"
"Shut up dude my dog's clean!"
A few days later...
"Dude! You'll never guess!"
"What?"
"My dog has fleas!"
-_-;;;;;;
Dog fleas don't bother humans. They also don't jump. They simply crawl in dog hair. I know, I've had my puli for eleven years now. Unless, of course, there are american sorts of fleas that actually do bite humans.
I Dalmatia, we have a plant the English name of shich I really don't know, but it's latin name is
Tanacetum cinerariifolium. It's flower contains two poisonous esthers (?), etheric oils, and other stuff that make it an excellent, completely natural and organic insecticide. Indeed, it's Croatian name is 'buhach', from 'buha' = flea. The natural insecticide is made from flowers, dried and ground (Latin: Flores Pyrethri). The plant was originaly found only in the karst regions of Dalmatia, Herzegovina (in Bosnia and Herzegovina), Montenegro, and Albania, but has since been taken to a huge number of other countries. Perhaps ask at your local drugstore?
Anyways, you powder your dog, or cat, with it, leave it for some time, and comb it off. Simple, yet effective. And 100% natural.
Hope this helps.