I had used Frontline on my two dogs in the past and they would both run and hide as soon as they saw that tube come out. Both of them had lowered red blood cell counts and the vet said that he didn't know why. After having read somewhere else that the prescription flea treatments were causing lowered red cell counts, I discontinued it. when the fleas started up again, I read some of the remedies on this website and decided to try the Dawn detergent first to get rid of them. GONE!! Worked like a charm. Since then, I've put a little garlic in their food and have been applying lemon juice to their coats (they don't run from the lemon juice!). I have had not flea one and their red blood cell counts are back up where they should be. I wonder how many more years have been added to my dog's lives by using natural methods? Thank you so much!