My daughter got lice (oh joy) and we went thru the whole gammet. When I spoke to my neighbor she confessed to me she used dog 'flea and tick' shampoo on her 7 year old because it has the same strenghth ingredient and was only $5 instead of $20 for RID. She said it worked the same...no lice. She also didn't notify the school about her daughters lice, because she didn't want to be forced to buy RID. I've heard of animal meds being the same etc but I've never heard this. I told her to talk to her doctor cuz ya never know. I also told her she could use the mayo or oil treatment for two weeks straight, washing the bedding etc to achieve the same results without having to use dog shampoo. UGH, dog shampoo? Has anybody else heard of this one?