<< Glad to read this!!! I too, have been using Ivermectin with no rotation
for
 many years--with no problems.  Started worrying here after reading all the
 "rotate 2X per year with double Strongid" posts.  
  >>
As I understand it, the 2X Strongid is for tapeworms, which ivermectin does
not touch.  Tapeworms in horses is rather unusual, except perhaps in certain
areas, right?
Linda