Here is what I posted earlier in another thread:
I have tried many of the vet recommended products including K9Advantix, ProMeris and Frontline Plus. NONE of them has worked. The neighbors behind me obviously don't treat their dogs or their yard so the fleas hop right on over to my yard and onto my babies. I decided to go the holistic route this year since spending big $$ on all the chemicals wasn't working. I bathed my boys in steeped lemon water yesterday and they have been getting garlic and brewer's yeast every day for about a week. I also use a flea comb on them and get at least 5+ fleas off Beau and 3+ off Bailey EVERY DAY! I sprayed my yard yesterday and fogged my house this morning when I left. I hope this works! These mutant fleas are about to drive my boys and me out of our own home
I'll let you know if I see any results! I did a search on the internet to find the holistic remedies. Good luck!