Here are some home remedies that may be of help, especially if you prefer to avoid chemicals. Good Luck!
Feline Flea Proofing
Add to the food for each adult cat:
1/2 level teaspoon brewer's yeast
1/4 level teaspoon garlic powder
Flea Destroyer
Set up a plate of sudsy water with a light hovering over it. The fleas are attracted to this and drown themselves.
Flea Repellent (for cats)
1/8 teaspoon tamari soy sauce
1 crushed whole clove
1/8 teaspoon water
1 fresh garlic clove
Marinate the garlic in the liquid for about 10 minutes and then remove it.
Add 1/16 teaspoon soy liquid to each 1/2 cup cat food. Use this repellent immediately.
Flea Repellent Pillows
These pillows are for dogs.
Source: Glen Brook Farms Herbs and Such
2 parts pennyroyal
1 part thyme
1 part wormwood
Herbs may be cut or whole; construct a pillow for your pet to sleep on and then stuff it with the pennyroyal, thyme, wormwood. This makes a nice gift for those favorite dogs in your life. These herbs help to repel fleas naturally and without harsh chemicals.
Flea Repellent Sleep Pillows
For cats
2 parts sage or rosemary
1 part catnip
1 part chamomile
For dogs
2 parts pennyroyal
1 part thyme
1 part wormwood
Herbs may be used cut or whole. Mix enough to stuff a 2-foot square pillow for a cat or a 3-foot square (or larger) pillow for a dog. Sew the pillowcase out of a tough, washable fabric such as denim.
Herbal Flea Powder
Use herbs in powdered form only.
2 ounces pennyroyal (use sage or rosemary for cats)
1 ounce rosemary
1 ounce wormwood
1 teaspoon cayenne pepper
Mix and store in a covered container. Use as often as any flea powder and rub into skin.
DO NOT LET POWDER GET INTO PET'S EYES.
Herbal Flea Powder
1 part eucalyptus powder
1 part pennyroyal powder (use sage or rosemary for cats)
1 part fennel powder
1 part yellow dock powder
Combine all ingredients in a shaker top jar and shake to mix.
Apply to your pet's fur by brushing backward with your hand or comb and sprinkling the powder into the roots of the hairs. Concentrate on the neck, back, and belly. Use just enough to add a little odor to the hairs.
For severe flea infestations, treat daily; otherwise, use two or three times a week.
http://www.recipegoldmine.com/pets/pets.html