This is the prescription used by Littleton Equine Medical Center and which is based upon a fecal exam which classifies each horse based on the passage of eggs as follows and recommends a particular worming schedule as follows:

 

MONTH

 

DEWORMING PRODUCT
Low Shedder                  <200 eggs per gram

*Note: Continue on Strongid C if currently using the product.

April Ivermectin or Powerpak EX: Eqvalan or Equell
September Moxidectin/Praziquantel

Ex: Quest Plus

Medium Shedder            200-500 eggs per gram April Ivermectin
July Strongid/Pyrantel
October Moxidectin/ Praziquantel
High Shedder                  >500 eggs per gram April Ivermectin or Powerpak
July Strongid/Pyrantel
October Moxidectin/ Praziquantel
January Strongid/Pyrantel or Both