- Seresto collar for dogs provides 8 months of continuous flea and tick prevention. - Seresto collar works through contact, so fleas and ticks don’t have to bite your dog to die - Seresto flea treatment for dogs also aids in the treatment and control of sarcoptic mange and kills lice - Seresto dog collar is vet recommended flea and tick prevention for dogs in a convenient, odorless, non greasy collar; No need for messy monthly treatments