Thank you. We have a major flea problem here, due to rodents infesting everything, everywhere. Don't like using chemicals like Frontline but have been doing so, as I HATE fleas. Now found Frontline isn't really working. Found one flea on one of my dogs, albeit half dead, but still it WAS a flea - SHUDDER!!!!!!!!!!! I know Apple Cider Vinegar is fantastic, so will get some and try that. Or I have Lavender Pure Essential Oil here now, so will use some when grooming the boys.