My next door neighbor is the groomer and she had told me that on the 48 hours, So, I looked it up online, and it says 48 hours..I use frontline on all but one of mine, on my shepherd, I use the sentinel, it is for heartworm, plus fleas, etc...not one flea on here this summer..of course, the ones on revolution didn't either, but, I like the sentinel, as its a chewable tablet.. |