A622
Parasite Control and Prevention


The following are general suggestions for routine parasite prevention. Each owner should evaluate his/her own premises and management practices. Then, in conjunction with a veterinarian, decide on a specific program for his/her particular situation.

Adults: A routine schedule would involve administration of a de-wormer every 1-2 months, depending on the product chosen. If a program using Strongid-C is chosen, daily administration is required. It is important to use a product that contains a boticide (Ivermectin or Moxidectin) in the early spring and again after the first frost in the fall. This will ensure that the stomach bot is killed while it is in the stomach, before it begins its larval migration.

Month

Schedule #1 (Pasture)

Schedule #2 (Stall)

Jan.

Oxybendazole or Fenbendazole  

Feb.

Pyrantel (Strongid-C)

Oxybendazole or Fenbendazole 

Mar.

Pyrantel (Strongid-C) 

April

Ivermectin or Moxidectin

Ivermectin or Moxidectin

May

Pyrantel (Strongid-C) 

June

Pyrantel (Strongid-C)

Oxybendazole or Fenbendazole

July

Ivermectin or Moxidectin 

Aug.

Pyrantel (Strongid-C)

Oxybendazole or Fenbendazole

Sept.

Pyrantel (Strongid-C) 

Oct.

Ivermectin or Moxidectin

Ivermectin or Moxidectin

Nov.

Pyrantel (Strongid-C) 

Dec.

Pyrantel (Strongid-C)

Oxybendazole or Fenbendazole

Foals:

Age

Suggested Products

1 month

Ivermectin

2 months

Oxybendazole or Fenbendazole

3 months

Oxybendazole or Fenbendazole

4 months

Ivermectin or Moxidectin

6 months

Oxybendazole or Fenbendazole

8 months

Oxybendazole or Fenbendazole

10 months

Ivermectin or Moxidectin

12 months

Oxybendazole or Fenbendazole 

* Whatever deworming schedule is chosen, it is essential to rotate the use of each product to help minimize resistance build-up. When a particular product is used over and over again, parasites can become resistant to that de-wormer.

* It is important to use Moxidectin (Quest) at least once in any given program to kill the encysted stages of some strongyles.