"..Does it just kill the fleas at bath time, or does it keep killing for awhile like days or weeks? Does it do anything to keep the fleas chased away from the dog?..."
Soap is a contact insecticide for some species of insects. It's even used on plants to kill aphids and such. Soap => Contact insecticide => Kills on contact. Does not persist (last) long. Doesn't "chase" anything.
Any bath and any soap will kill fleas. Keep the dog wet and lathered up for about 5 minutes and the fleas will be slowed down until they drown.
And about essential oils for pets -- Don't read a bunch of stuff on the internet blogs and then turn your dog or other pet into a medical experiment. If you don't really KNOW what you're doing, just don't. There are EOs that kill fleas, yes, but they can also make a dog incredibly ill, including irreversible kidney or liver failure, or even kill a dog outright. And bear in mind that dogs are much more tolerant of EOs than cats (and other small animals, including birds).
Soap is a contact insecticide for some species of insects. It's even used on plants to kill aphids and such. Soap => Contact insecticide => Kills on contact. Does not persist (last) long. Doesn't "chase" anything.
Any bath and any soap will kill fleas. Keep the dog wet and lathered up for about 5 minutes and the fleas will be slowed down until they drown.
And about essential oils for pets -- Don't read a bunch of stuff on the internet blogs and then turn your dog or other pet into a medical experiment. If you don't really KNOW what you're doing, just don't. There are EOs that kill fleas, yes, but they can also make a dog incredibly ill, including irreversible kidney or liver failure, or even kill a dog outright. And bear in mind that dogs are much more tolerant of EOs than cats (and other small animals, including birds).