Ranked 1st in our list of recommended flea combs and sells for $59.98 (as of 25/05/2023 11:45 PDT details ) , more than 55% of the Bayer Animal Health 85274422 reviews are positive. With features such as contains 30 soft chews for large dogs a single dose of advantus kills adult fleas on a dog. it is safe to repeat treatments as needed, up to once per day and although it does not prevent fleas, advantus works to kill them, starting within one hour. for monthly flea and tick prevention, consider seresto or k9 advantix ii for dogs., it is indeed our top pick among flea combs.