The Importance of Deworming Foals...Correctly!
I'm guessing that most people raising foals are
not deworming as often as I am,
and a few people are deworming more often than me.
The issue here isn't frequency...it's effectiveness!
Even though I am embarrassed about this, I want to share it
with everyone because I think it's in the best interest of all horse owners
to know what a difference a proper deworming program does for our horses.
We dewormed a 2008 colt with the following schedule during the 9 months we
had him before he left for his new home. Note that one of those times was
4-day-in-a-row fenbendazole double dose.
Birth 6/10/08 Ivermectin
liquid, 1-2 cc's (attempted 2, but doubt it was all swallowed)
2 months 8/19/08 Ivermectin
3 months 9/4/2008 Panacur
fenbendazole 4 consecutive days, double dose
5 months 11/4/08 Ivermectin
7 months 1/6/09 Panacur fenbendazole single day, double dose
8 months 2/12/09 Ivermectin
9 months 3/16/09 Panacur fenbendazole single day, double dose
9 months 3/17/09 Ivermectin
I never saw worms (and did look) until giving the
consecutive days on the 16th and 17th of March, 2009. The worms (ascarids) POURED out
of that colt for two days! (at least 6 worms in each stool)
Since the other 3 colts in the pasture with him didn't look as bad as he
did, I examined their deworming records. They were weaned at a different
time than him, so there was one difference:
Pyrantel pamoate. This third
deworming medication was given to them one time.
The other foals got the same dewormers above, except in November, they also
Exodus, etc.). But I ran out of
it before finishing all of our horses, so the above colt got
One would think that even rotating with 2 dewormers would be sufficient, but
this colt is evidence that it is not.
Like I said, it's embarrassing to admit that we had this problem. I'm a
deworming fanatic, but dropped the ball by not noticing that this colt
didn't get the third type of medication (pyrantel)
in the rotation. We live in Iowa, a location that evidently supports the
life cycle of roundworms quite nicely...which doesn't help.
In any case, I hope that you'll peek at your deworming schedule to make
sure you're rotating your dewormers to include THREE different families of
If you are not doing that, you might just be surprised to
know what's going on inside your horse! :-)
Toni, who is red-faced and slapping her forehead....