I've never heard of anyone using salt for fleas.

As stated, flea prevention and flea treatment are two completely different ball games.

I have heard of owners using diatomaceous earth for fleas, but I have no personal experience, nor do I know of anyone directly that has used this before. But this link may be helpful: http://vetmedicine.about.com/od/para...ea-Control.htm

I understand not wanting to use chemicals on your pets. When it comes to a flea infestation, you need to understand that once you're seeing fleas on your pets that they've been in the environment for quite some time. As in.... your house and yard. You will need to not only treat ALL household pets for fleas for a MINIMUM of 3 months (due to the life cycle of the fleas), you will also need to treat your house as well. Daily vacuuming, emptying the bag/canister OUTSIDE of the house (or emptying it inside and then immediately bringing the bag outdoors to prevent eggs hatching and climbing back out) and also rinsing out the canister (if you have a bagless vacuum). Vigorous washing of ALL bedsheets and linens, paying special care to areas that your pets frequent (the couch, bed, etc). Clean ALL dog beds and try to limit your pets' access to laying on stuff that is difficult to vacuum or keep clean like couches and beds.

Bathing the pets is fine; you don't necessarily need to buy a flea shampoo as water alone will kill fleas. You don't want to bathe them TOO frequently, though, as you can cause other skin/haircoat issues by doing it too frequently. Also, even with flea shampoos you will not have any residual effect from using bathing products. They will get rid of all/most fleas on the pet at the time but does not prevent them from becoming reinfested by fleas in the environment.

You need to treat the pets AND treat the household and possibly the outdoor environment where they got them from... or you will continue to have a recurring problem.

Good luck!