I give mine ivomec once a month it ain't helped with fleas or ticks. Bought some permetherin 3-5 cc down the back, seems to be helping.
Same here Tom. Used Ivermec for as long as i can remember and have never seen it work for Fleas or Ticks. can't say i have ever had a Tick problem but i am having a Flea problem like everyone else this year bad. Just bought some Permethrin, seen alot of people post about it on a thread here on this site. Glad i red the article and took the advice from the others that use it and have success. Thanks to all that posted about it. Good price also at Tractor Supply.