This is for my 10 mo. old Pit Bull. She was covered in little bumps and almost looked like a rash and scratched herself furless. None of the vet trips did anything for her and I was told she was allergic to flea bites. I was advised (by a friend) to use ACV, 50/50 also, but to also substitute boiled lemon water for the mix. I sliced up a lemon and brought it to a boil and then let it sit and steep overnight. I then used it to cut the ACV 50/50. I've since seen the same recipe online, along with the suggestion to add a drop or two of either cedar or lavender oil as repellent. I have used the mix and can say that it indeed kills fleas and ticks here in the woods. It has definitely also gotten rid of the scratching fits, as well as the fleas and ticks I find are dead or dying. She looks a lot better with fur.