Steph,I saw you post and was about to suggest DE when I see that Lymemom has already suggested it.
Check it out at:
www.herbalhealer.com
I will go ahead and post the info:
DIATOMACEOUS EARTH
DIATOMACEOUS EARTH has been right under our feet for eons, waiting to be discovered as a safe, effective control for garden pests.
For relief of flea and tick problems with pets and for the elimination of parasites in livestock.
Diatomaceous earth is mined from fossilized deposits of shells formed by tiny diatoms. These are single celled plants of the sea that are millions of years old.
According to National Geographic reports, "Death comes within 12 hours after insects venture into the D.E. They pierce their skins or waxy shells on the sharp edges of the diatoms siliceous shells and die of dehydration."
This product is completely safe to use and because of it's trace mineral content it is good for the animals, plants and the environment. We have tested D.E. at the Herbal Healer Academy.
Roses: 1 cup to 2 gallons water in a sprayer. Or it can be dusted directly on all plants.
For turkeys, chickens, quail and pheasants, use 1 tablespoon per gallon of feed. You can give this product to horses; it adds minerals to the diet, helps kill intestinal parasites, and keeps the flies down in the manure.
D.E. can be added to your storage food to keep out the weevils. When applied topically on dogs and cats, you will find that it takes a few days to kill all the fleas.
Dust animal and then all the bedding and outside the front door. Will not harm your carpets, but will leave a white dust to vacuum up.
Note: If used outside and it rains and washes the D.E. away you must re-apply to be continually effective.
Diatomaceous Earth can be added to stored grains: 1 ounce per bushel, or 1 teaspoon per quart, will keep the bugs out for indefinite periods, doing no harm to the grain!
Diatomaceous Earth is completely safe to use and kills fleas and pests. The only contraindication is not to breath too much of the dust into lungs as it can irritate the lungs.
http://www.herbalhealer.com/parasites.html
Just a thought,
Maggie