I musta had the vietcong fleas. Salted mine several years ago and think they were just licking it and drinking margaritas.
Burned oil and diesel wouldn't even touch them. Finally went with the advice given and tried the comfortis pills. Total clean out......Truthfully never saw the like in all my days of foolin with dogs. Been a complete year now without a single flea and haven't had to give any more pills except the one dose.
Yep... comfortis is the shiznit. I haven't even seen a flea this year.