“I have been using this since I got my little boy. I use this one because the RSPCA uses it. It is easy to apply and smells good. It appears to work, as I havent seen any of the target organisms on my boy. Just make sure you apply it high enough on the neck and head that your little darling cant lick it off. My husband applied it once and he put it too low on the neck. My little boy licked some off and was sick and not moving much for at least 5 days. That only happened the once and it has been good otherwise.”