I wouldn't use advocate spot ons on my dogs ever again ,my old whippet got lung worm and vet assured me it would clear it up but after giving him one spot on every week for a month it hadn't done fcuk all ,
Gave him milbamax and it cleared the lung worm up in a week,so only wormers my dogs get his drontal and milbamax every 4 months ,I raley flea my dogs because they never get them ,I do mix a scoop of billy no mates into the feed once a week.